1ac27a0ecSDave Kleikamp /* 2617ba13bSMingming Cao * linux/fs/ext4/super.c 3ac27a0ecSDave Kleikamp * 4ac27a0ecSDave Kleikamp * Copyright (C) 1992, 1993, 1994, 1995 5ac27a0ecSDave Kleikamp * Remy Card (card@masi.ibp.fr) 6ac27a0ecSDave Kleikamp * Laboratoire MASI - Institut Blaise Pascal 7ac27a0ecSDave Kleikamp * Universite Pierre et Marie Curie (Paris VI) 8ac27a0ecSDave Kleikamp * 9ac27a0ecSDave Kleikamp * from 10ac27a0ecSDave Kleikamp * 11ac27a0ecSDave Kleikamp * linux/fs/minix/inode.c 12ac27a0ecSDave Kleikamp * 13ac27a0ecSDave Kleikamp * Copyright (C) 1991, 1992 Linus Torvalds 14ac27a0ecSDave Kleikamp * 15ac27a0ecSDave Kleikamp * Big-endian to little-endian byte-swapping/bitmaps by 16ac27a0ecSDave Kleikamp * David S. Miller (davem@caip.rutgers.edu), 1995 17ac27a0ecSDave Kleikamp */ 18ac27a0ecSDave Kleikamp 19ac27a0ecSDave Kleikamp #include <linux/module.h> 20ac27a0ecSDave Kleikamp #include <linux/string.h> 21ac27a0ecSDave Kleikamp #include <linux/fs.h> 22ac27a0ecSDave Kleikamp #include <linux/time.h> 23dab291afSMingming Cao #include <linux/jbd2.h> 24ac27a0ecSDave Kleikamp #include <linux/slab.h> 25ac27a0ecSDave Kleikamp #include <linux/init.h> 26ac27a0ecSDave Kleikamp #include <linux/blkdev.h> 27ac27a0ecSDave Kleikamp #include <linux/parser.h> 28ac27a0ecSDave Kleikamp #include <linux/smp_lock.h> 29ac27a0ecSDave Kleikamp #include <linux/buffer_head.h> 30a5694255SChristoph Hellwig #include <linux/exportfs.h> 31ac27a0ecSDave Kleikamp #include <linux/vfs.h> 32ac27a0ecSDave Kleikamp #include <linux/random.h> 33ac27a0ecSDave Kleikamp #include <linux/mount.h> 34ac27a0ecSDave Kleikamp #include <linux/namei.h> 35ac27a0ecSDave Kleikamp #include <linux/quotaops.h> 36ac27a0ecSDave Kleikamp #include <linux/seq_file.h> 379f6200bbSTheodore Ts'o #include <linux/proc_fs.h> 38ede86cc4STheodore Ts'o #include <linux/marker.h> 391330593eSVignesh Babu #include <linux/log2.h> 40717d50e4SAndreas Dilger #include <linux/crc16.h> 41ac27a0ecSDave Kleikamp #include <asm/uaccess.h> 42ac27a0ecSDave Kleikamp 433dcf5451SChristoph Hellwig #include "ext4.h" 443dcf5451SChristoph Hellwig #include "ext4_jbd2.h" 45ac27a0ecSDave Kleikamp #include "xattr.h" 46ac27a0ecSDave Kleikamp #include "acl.h" 47ac27a0ecSDave Kleikamp #include "namei.h" 48717d50e4SAndreas Dilger #include "group.h" 49ac27a0ecSDave Kleikamp 509f6200bbSTheodore Ts'o struct proc_dir_entry *ext4_proc_root; 519f6200bbSTheodore Ts'o 52617ba13bSMingming Cao static int ext4_load_journal(struct super_block *, struct ext4_super_block *, 53ac27a0ecSDave Kleikamp unsigned long journal_devnum); 54*c4be0c1dSTakashi Sato static int ext4_commit_super(struct super_block *sb, 552b2d6d01STheodore Ts'o struct ext4_super_block *es, int sync); 56617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 57617ba13bSMingming Cao struct ext4_super_block *es); 58617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 59617ba13bSMingming Cao struct ext4_super_block *es); 60617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait); 61617ba13bSMingming Cao static const char *ext4_decode_error(struct super_block *sb, int errno, 62ac27a0ecSDave Kleikamp char nbuf[16]); 63617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data); 64617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); 65*c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb); 66617ba13bSMingming Cao static void ext4_write_super(struct super_block *sb); 67*c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb); 68ac27a0ecSDave Kleikamp 69bd81d8eeSLaurent Vivier 708fadc143SAlexandre Ratchov ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 718fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 72bd81d8eeSLaurent Vivier { 733a14589cSAneesh Kumar K.V return le32_to_cpu(bg->bg_block_bitmap_lo) | 748fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 758fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); 76bd81d8eeSLaurent Vivier } 77bd81d8eeSLaurent Vivier 788fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 798fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 80bd81d8eeSLaurent Vivier { 815272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_bitmap_lo) | 828fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 838fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); 84bd81d8eeSLaurent Vivier } 85bd81d8eeSLaurent Vivier 868fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_table(struct super_block *sb, 878fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 88bd81d8eeSLaurent Vivier { 895272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_table_lo) | 908fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 918fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); 92bd81d8eeSLaurent Vivier } 93bd81d8eeSLaurent Vivier 94560671a0SAneesh Kumar K.V __u32 ext4_free_blks_count(struct super_block *sb, 95560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 96560671a0SAneesh Kumar K.V { 97560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_blocks_count_lo) | 98560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 99560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); 100560671a0SAneesh Kumar K.V } 101560671a0SAneesh Kumar K.V 102560671a0SAneesh Kumar K.V __u32 ext4_free_inodes_count(struct super_block *sb, 103560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 104560671a0SAneesh Kumar K.V { 105560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_inodes_count_lo) | 106560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 107560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); 108560671a0SAneesh Kumar K.V } 109560671a0SAneesh Kumar K.V 110560671a0SAneesh Kumar K.V __u32 ext4_used_dirs_count(struct super_block *sb, 111560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 112560671a0SAneesh Kumar K.V { 113560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_used_dirs_count_lo) | 114560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 115560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); 116560671a0SAneesh Kumar K.V } 117560671a0SAneesh Kumar K.V 118560671a0SAneesh Kumar K.V __u32 ext4_itable_unused_count(struct super_block *sb, 119560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 120560671a0SAneesh Kumar K.V { 121560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_itable_unused_lo) | 122560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 123560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); 124560671a0SAneesh Kumar K.V } 125560671a0SAneesh Kumar K.V 1268fadc143SAlexandre Ratchov void ext4_block_bitmap_set(struct super_block *sb, 1278fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 128bd81d8eeSLaurent Vivier { 1293a14589cSAneesh Kumar K.V bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); 1308fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 1318fadc143SAlexandre Ratchov bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); 132bd81d8eeSLaurent Vivier } 133bd81d8eeSLaurent Vivier 1348fadc143SAlexandre Ratchov void ext4_inode_bitmap_set(struct super_block *sb, 1358fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 136bd81d8eeSLaurent Vivier { 1375272f837SAneesh Kumar K.V bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); 1388fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 1398fadc143SAlexandre Ratchov bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); 140bd81d8eeSLaurent Vivier } 141bd81d8eeSLaurent Vivier 1428fadc143SAlexandre Ratchov void ext4_inode_table_set(struct super_block *sb, 1438fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 144bd81d8eeSLaurent Vivier { 1455272f837SAneesh Kumar K.V bg->bg_inode_table_lo = cpu_to_le32((u32)blk); 1468fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 1478fadc143SAlexandre Ratchov bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); 148bd81d8eeSLaurent Vivier } 149bd81d8eeSLaurent Vivier 150560671a0SAneesh Kumar K.V void ext4_free_blks_set(struct super_block *sb, 151560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 152560671a0SAneesh Kumar K.V { 153560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); 154560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 155560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); 156560671a0SAneesh Kumar K.V } 157560671a0SAneesh Kumar K.V 158560671a0SAneesh Kumar K.V void ext4_free_inodes_set(struct super_block *sb, 159560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 160560671a0SAneesh Kumar K.V { 161560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); 162560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 163560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); 164560671a0SAneesh Kumar K.V } 165560671a0SAneesh Kumar K.V 166560671a0SAneesh Kumar K.V void ext4_used_dirs_set(struct super_block *sb, 167560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 168560671a0SAneesh Kumar K.V { 169560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); 170560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 171560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); 172560671a0SAneesh Kumar K.V } 173560671a0SAneesh Kumar K.V 174560671a0SAneesh Kumar K.V void ext4_itable_unused_set(struct super_block *sb, 175560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 176560671a0SAneesh Kumar K.V { 177560671a0SAneesh Kumar K.V bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); 178560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 179560671a0SAneesh Kumar K.V bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); 180560671a0SAneesh Kumar K.V } 181560671a0SAneesh Kumar K.V 182ac27a0ecSDave Kleikamp /* 183dab291afSMingming Cao * Wrappers for jbd2_journal_start/end. 184ac27a0ecSDave Kleikamp * 185ac27a0ecSDave Kleikamp * The only special thing we need to do here is to make sure that all 186ac27a0ecSDave Kleikamp * journal_end calls result in the superblock being marked dirty, so 187ac27a0ecSDave Kleikamp * that sync() will call the filesystem's write_super callback if 188ac27a0ecSDave Kleikamp * appropriate. 189ac27a0ecSDave Kleikamp */ 190617ba13bSMingming Cao handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks) 191ac27a0ecSDave Kleikamp { 192ac27a0ecSDave Kleikamp journal_t *journal; 193ac27a0ecSDave Kleikamp 194ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 195ac27a0ecSDave Kleikamp return ERR_PTR(-EROFS); 196ac27a0ecSDave Kleikamp 197ac27a0ecSDave Kleikamp /* Special case here: if the journal has aborted behind our 198ac27a0ecSDave Kleikamp * backs (eg. EIO in the commit thread), then we still need to 199ac27a0ecSDave Kleikamp * take the FS itself readonly cleanly. */ 200617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 2010390131bSFrank Mayhar if (journal) { 202ac27a0ecSDave Kleikamp if (is_journal_aborted(journal)) { 20346e665e9SHarvey Harrison ext4_abort(sb, __func__, 204ac27a0ecSDave Kleikamp "Detected aborted journal"); 205ac27a0ecSDave Kleikamp return ERR_PTR(-EROFS); 206ac27a0ecSDave Kleikamp } 207dab291afSMingming Cao return jbd2_journal_start(journal, nblocks); 208ac27a0ecSDave Kleikamp } 2090390131bSFrank Mayhar /* 2100390131bSFrank Mayhar * We're not journaling, return the appropriate indication. 2110390131bSFrank Mayhar */ 2120390131bSFrank Mayhar current->journal_info = EXT4_NOJOURNAL_HANDLE; 2130390131bSFrank Mayhar return current->journal_info; 2140390131bSFrank Mayhar } 215ac27a0ecSDave Kleikamp 216ac27a0ecSDave Kleikamp /* 217ac27a0ecSDave Kleikamp * The only special thing we need to do here is to make sure that all 218dab291afSMingming Cao * jbd2_journal_stop calls result in the superblock being marked dirty, so 219ac27a0ecSDave Kleikamp * that sync() will call the filesystem's write_super callback if 220ac27a0ecSDave Kleikamp * appropriate. 221ac27a0ecSDave Kleikamp */ 222617ba13bSMingming Cao int __ext4_journal_stop(const char *where, handle_t *handle) 223ac27a0ecSDave Kleikamp { 224ac27a0ecSDave Kleikamp struct super_block *sb; 225ac27a0ecSDave Kleikamp int err; 226ac27a0ecSDave Kleikamp int rc; 227ac27a0ecSDave Kleikamp 2280390131bSFrank Mayhar if (!ext4_handle_valid(handle)) { 2290390131bSFrank Mayhar /* 2300390131bSFrank Mayhar * Do this here since we don't call jbd2_journal_stop() in 2310390131bSFrank Mayhar * no-journal mode. 2320390131bSFrank Mayhar */ 2330390131bSFrank Mayhar current->journal_info = NULL; 2340390131bSFrank Mayhar return 0; 2350390131bSFrank Mayhar } 236ac27a0ecSDave Kleikamp sb = handle->h_transaction->t_journal->j_private; 237ac27a0ecSDave Kleikamp err = handle->h_err; 238dab291afSMingming Cao rc = jbd2_journal_stop(handle); 239ac27a0ecSDave Kleikamp 240ac27a0ecSDave Kleikamp if (!err) 241ac27a0ecSDave Kleikamp err = rc; 242ac27a0ecSDave Kleikamp if (err) 243617ba13bSMingming Cao __ext4_std_error(sb, where, err); 244ac27a0ecSDave Kleikamp return err; 245ac27a0ecSDave Kleikamp } 246ac27a0ecSDave Kleikamp 247617ba13bSMingming Cao void ext4_journal_abort_handle(const char *caller, const char *err_fn, 248ac27a0ecSDave Kleikamp struct buffer_head *bh, handle_t *handle, int err) 249ac27a0ecSDave Kleikamp { 250ac27a0ecSDave Kleikamp char nbuf[16]; 251617ba13bSMingming Cao const char *errstr = ext4_decode_error(NULL, err, nbuf); 252ac27a0ecSDave Kleikamp 2530390131bSFrank Mayhar BUG_ON(!ext4_handle_valid(handle)); 2540390131bSFrank Mayhar 255ac27a0ecSDave Kleikamp if (bh) 256ac27a0ecSDave Kleikamp BUFFER_TRACE(bh, "abort"); 257ac27a0ecSDave Kleikamp 258ac27a0ecSDave Kleikamp if (!handle->h_err) 259ac27a0ecSDave Kleikamp handle->h_err = err; 260ac27a0ecSDave Kleikamp 261ac27a0ecSDave Kleikamp if (is_handle_aborted(handle)) 262ac27a0ecSDave Kleikamp return; 263ac27a0ecSDave Kleikamp 264ac27a0ecSDave Kleikamp printk(KERN_ERR "%s: aborting transaction: %s in %s\n", 265ac27a0ecSDave Kleikamp caller, errstr, err_fn); 266ac27a0ecSDave Kleikamp 267dab291afSMingming Cao jbd2_journal_abort_handle(handle); 268ac27a0ecSDave Kleikamp } 269ac27a0ecSDave Kleikamp 270ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 271ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 272ac27a0ecSDave Kleikamp * 273ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 274617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 275ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 276ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 277ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 278ac27a0ecSDave Kleikamp * write out the superblock safely. 279ac27a0ecSDave Kleikamp * 280dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 281ac27a0ecSDave Kleikamp * the journal instead. On recovery, the journal will compain about 282ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 283ac27a0ecSDave Kleikamp */ 284ac27a0ecSDave Kleikamp 285617ba13bSMingming Cao static void ext4_handle_error(struct super_block *sb) 286ac27a0ecSDave Kleikamp { 287617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 288ac27a0ecSDave Kleikamp 289617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 290617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 291ac27a0ecSDave Kleikamp 292ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 293ac27a0ecSDave Kleikamp return; 294ac27a0ecSDave Kleikamp 295ac27a0ecSDave Kleikamp if (!test_opt(sb, ERRORS_CONT)) { 296617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 297ac27a0ecSDave Kleikamp 298617ba13bSMingming Cao EXT4_SB(sb)->s_mount_opt |= EXT4_MOUNT_ABORT; 299ac27a0ecSDave Kleikamp if (journal) 300dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 301ac27a0ecSDave Kleikamp } 302ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_RO)) { 303ac27a0ecSDave Kleikamp printk(KERN_CRIT "Remounting filesystem read-only\n"); 304ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 305ac27a0ecSDave Kleikamp } 306617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 307ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_PANIC)) 308617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 309ac27a0ecSDave Kleikamp sb->s_id); 310ac27a0ecSDave Kleikamp } 311ac27a0ecSDave Kleikamp 312617ba13bSMingming Cao void ext4_error(struct super_block *sb, const char *function, 313ac27a0ecSDave Kleikamp const char *fmt, ...) 314ac27a0ecSDave Kleikamp { 315ac27a0ecSDave Kleikamp va_list args; 316ac27a0ecSDave Kleikamp 317ac27a0ecSDave Kleikamp va_start(args, fmt); 318617ba13bSMingming Cao printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function); 319ac27a0ecSDave Kleikamp vprintk(fmt, args); 320ac27a0ecSDave Kleikamp printk("\n"); 321ac27a0ecSDave Kleikamp va_end(args); 322ac27a0ecSDave Kleikamp 323617ba13bSMingming Cao ext4_handle_error(sb); 324ac27a0ecSDave Kleikamp } 325ac27a0ecSDave Kleikamp 326617ba13bSMingming Cao static const char *ext4_decode_error(struct super_block *sb, int errno, 327ac27a0ecSDave Kleikamp char nbuf[16]) 328ac27a0ecSDave Kleikamp { 329ac27a0ecSDave Kleikamp char *errstr = NULL; 330ac27a0ecSDave Kleikamp 331ac27a0ecSDave Kleikamp switch (errno) { 332ac27a0ecSDave Kleikamp case -EIO: 333ac27a0ecSDave Kleikamp errstr = "IO failure"; 334ac27a0ecSDave Kleikamp break; 335ac27a0ecSDave Kleikamp case -ENOMEM: 336ac27a0ecSDave Kleikamp errstr = "Out of memory"; 337ac27a0ecSDave Kleikamp break; 338ac27a0ecSDave Kleikamp case -EROFS: 339dab291afSMingming Cao if (!sb || EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT) 340ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 341ac27a0ecSDave Kleikamp else 342ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 343ac27a0ecSDave Kleikamp break; 344ac27a0ecSDave Kleikamp default: 345ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 346ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 347ac27a0ecSDave Kleikamp * NULL. */ 348ac27a0ecSDave Kleikamp if (nbuf) { 349ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 350ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 351ac27a0ecSDave Kleikamp errstr = nbuf; 352ac27a0ecSDave Kleikamp } 353ac27a0ecSDave Kleikamp break; 354ac27a0ecSDave Kleikamp } 355ac27a0ecSDave Kleikamp 356ac27a0ecSDave Kleikamp return errstr; 357ac27a0ecSDave Kleikamp } 358ac27a0ecSDave Kleikamp 359617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 360ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 361ac27a0ecSDave Kleikamp 3622b2d6d01STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, int errno) 363ac27a0ecSDave Kleikamp { 364ac27a0ecSDave Kleikamp char nbuf[16]; 365ac27a0ecSDave Kleikamp const char *errstr; 366ac27a0ecSDave Kleikamp 367ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 368ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 369ac27a0ecSDave Kleikamp * an error. */ 370ac27a0ecSDave Kleikamp if (errno == -EROFS && journal_current_handle() == NULL && 371ac27a0ecSDave Kleikamp (sb->s_flags & MS_RDONLY)) 372ac27a0ecSDave Kleikamp return; 373ac27a0ecSDave Kleikamp 374617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 375617ba13bSMingming Cao printk(KERN_CRIT "EXT4-fs error (device %s) in %s: %s\n", 376ac27a0ecSDave Kleikamp sb->s_id, function, errstr); 377ac27a0ecSDave Kleikamp 378617ba13bSMingming Cao ext4_handle_error(sb); 379ac27a0ecSDave Kleikamp } 380ac27a0ecSDave Kleikamp 381ac27a0ecSDave Kleikamp /* 382617ba13bSMingming Cao * ext4_abort is a much stronger failure handler than ext4_error. The 383ac27a0ecSDave Kleikamp * abort function may be used to deal with unrecoverable failures such 384ac27a0ecSDave Kleikamp * as journal IO errors or ENOMEM at a critical moment in log management. 385ac27a0ecSDave Kleikamp * 386ac27a0ecSDave Kleikamp * We unconditionally force the filesystem into an ABORT|READONLY state, 387ac27a0ecSDave Kleikamp * unless the error response on the fs has been set to panic in which 388ac27a0ecSDave Kleikamp * case we take the easy way out and panic immediately. 389ac27a0ecSDave Kleikamp */ 390ac27a0ecSDave Kleikamp 391617ba13bSMingming Cao void ext4_abort(struct super_block *sb, const char *function, 392ac27a0ecSDave Kleikamp const char *fmt, ...) 393ac27a0ecSDave Kleikamp { 394ac27a0ecSDave Kleikamp va_list args; 395ac27a0ecSDave Kleikamp 396617ba13bSMingming Cao printk(KERN_CRIT "ext4_abort called.\n"); 397ac27a0ecSDave Kleikamp 398ac27a0ecSDave Kleikamp va_start(args, fmt); 399617ba13bSMingming Cao printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function); 400ac27a0ecSDave Kleikamp vprintk(fmt, args); 401ac27a0ecSDave Kleikamp printk("\n"); 402ac27a0ecSDave Kleikamp va_end(args); 403ac27a0ecSDave Kleikamp 404ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_PANIC)) 405617ba13bSMingming Cao panic("EXT4-fs panic from previous error\n"); 406ac27a0ecSDave Kleikamp 407ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 408ac27a0ecSDave Kleikamp return; 409ac27a0ecSDave Kleikamp 410ac27a0ecSDave Kleikamp printk(KERN_CRIT "Remounting filesystem read-only\n"); 411617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 412ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 413617ba13bSMingming Cao EXT4_SB(sb)->s_mount_opt |= EXT4_MOUNT_ABORT; 414ef2cabf7SHidehiro Kawai if (EXT4_SB(sb)->s_journal) 415dab291afSMingming Cao jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); 416ac27a0ecSDave Kleikamp } 417ac27a0ecSDave Kleikamp 418617ba13bSMingming Cao void ext4_warning(struct super_block *sb, const char *function, 419ac27a0ecSDave Kleikamp const char *fmt, ...) 420ac27a0ecSDave Kleikamp { 421ac27a0ecSDave Kleikamp va_list args; 422ac27a0ecSDave Kleikamp 423ac27a0ecSDave Kleikamp va_start(args, fmt); 424617ba13bSMingming Cao printk(KERN_WARNING "EXT4-fs warning (device %s): %s: ", 425ac27a0ecSDave Kleikamp sb->s_id, function); 426ac27a0ecSDave Kleikamp vprintk(fmt, args); 427ac27a0ecSDave Kleikamp printk("\n"); 428ac27a0ecSDave Kleikamp va_end(args); 429ac27a0ecSDave Kleikamp } 430ac27a0ecSDave Kleikamp 4315d1b1b3fSAneesh Kumar K.V void ext4_grp_locked_error(struct super_block *sb, ext4_group_t grp, 4325d1b1b3fSAneesh Kumar K.V const char *function, const char *fmt, ...) 4335d1b1b3fSAneesh Kumar K.V __releases(bitlock) 4345d1b1b3fSAneesh Kumar K.V __acquires(bitlock) 4355d1b1b3fSAneesh Kumar K.V { 4365d1b1b3fSAneesh Kumar K.V va_list args; 4375d1b1b3fSAneesh Kumar K.V struct ext4_super_block *es = EXT4_SB(sb)->s_es; 4385d1b1b3fSAneesh Kumar K.V 4395d1b1b3fSAneesh Kumar K.V va_start(args, fmt); 4405d1b1b3fSAneesh Kumar K.V printk(KERN_CRIT "EXT4-fs error (device %s): %s: ", sb->s_id, function); 4415d1b1b3fSAneesh Kumar K.V vprintk(fmt, args); 4425d1b1b3fSAneesh Kumar K.V printk("\n"); 4435d1b1b3fSAneesh Kumar K.V va_end(args); 4445d1b1b3fSAneesh Kumar K.V 4455d1b1b3fSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT)) { 4465d1b1b3fSAneesh Kumar K.V EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 4475d1b1b3fSAneesh Kumar K.V es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 4485d1b1b3fSAneesh Kumar K.V ext4_commit_super(sb, es, 0); 4495d1b1b3fSAneesh Kumar K.V return; 4505d1b1b3fSAneesh Kumar K.V } 4515d1b1b3fSAneesh Kumar K.V ext4_unlock_group(sb, grp); 4525d1b1b3fSAneesh Kumar K.V ext4_handle_error(sb); 4535d1b1b3fSAneesh Kumar K.V /* 4545d1b1b3fSAneesh Kumar K.V * We only get here in the ERRORS_RO case; relocking the group 4555d1b1b3fSAneesh Kumar K.V * may be dangerous, but nothing bad will happen since the 4565d1b1b3fSAneesh Kumar K.V * filesystem will have already been marked read/only and the 4575d1b1b3fSAneesh Kumar K.V * journal has been aborted. We return 1 as a hint to callers 4585d1b1b3fSAneesh Kumar K.V * who might what to use the return value from 4595d1b1b3fSAneesh Kumar K.V * ext4_grp_locked_error() to distinguish beween the 4605d1b1b3fSAneesh Kumar K.V * ERRORS_CONT and ERRORS_RO case, and perhaps return more 4615d1b1b3fSAneesh Kumar K.V * aggressively from the ext4 function in question, with a 4625d1b1b3fSAneesh Kumar K.V * more appropriate error code. 4635d1b1b3fSAneesh Kumar K.V */ 4645d1b1b3fSAneesh Kumar K.V ext4_lock_group(sb, grp); 4655d1b1b3fSAneesh Kumar K.V return; 4665d1b1b3fSAneesh Kumar K.V } 4675d1b1b3fSAneesh Kumar K.V 4685d1b1b3fSAneesh Kumar K.V 469617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 470ac27a0ecSDave Kleikamp { 471617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 472ac27a0ecSDave Kleikamp 473617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 474ac27a0ecSDave Kleikamp return; 475ac27a0ecSDave Kleikamp 47646e665e9SHarvey Harrison ext4_warning(sb, __func__, 477ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 478ac27a0ecSDave Kleikamp "running e2fsck is recommended", 479617ba13bSMingming Cao EXT4_DYNAMIC_REV); 480ac27a0ecSDave Kleikamp 481617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 482617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 483617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 484ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 485ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 486ac27a0ecSDave Kleikamp 487ac27a0ecSDave Kleikamp /* 488ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 489ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 490ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 491ac27a0ecSDave Kleikamp */ 492ac27a0ecSDave Kleikamp } 493ac27a0ecSDave Kleikamp 494ac27a0ecSDave Kleikamp /* 495ac27a0ecSDave Kleikamp * Open the external journal device 496ac27a0ecSDave Kleikamp */ 497617ba13bSMingming Cao static struct block_device *ext4_blkdev_get(dev_t dev) 498ac27a0ecSDave Kleikamp { 499ac27a0ecSDave Kleikamp struct block_device *bdev; 500ac27a0ecSDave Kleikamp char b[BDEVNAME_SIZE]; 501ac27a0ecSDave Kleikamp 502ac27a0ecSDave Kleikamp bdev = open_by_devnum(dev, FMODE_READ|FMODE_WRITE); 503ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 504ac27a0ecSDave Kleikamp goto fail; 505ac27a0ecSDave Kleikamp return bdev; 506ac27a0ecSDave Kleikamp 507ac27a0ecSDave Kleikamp fail: 508abda1418STheodore Ts'o printk(KERN_ERR "EXT4-fs: failed to open journal device %s: %ld\n", 509ac27a0ecSDave Kleikamp __bdevname(dev, b), PTR_ERR(bdev)); 510ac27a0ecSDave Kleikamp return NULL; 511ac27a0ecSDave Kleikamp } 512ac27a0ecSDave Kleikamp 513ac27a0ecSDave Kleikamp /* 514ac27a0ecSDave Kleikamp * Release the journal device 515ac27a0ecSDave Kleikamp */ 516617ba13bSMingming Cao static int ext4_blkdev_put(struct block_device *bdev) 517ac27a0ecSDave Kleikamp { 518ac27a0ecSDave Kleikamp bd_release(bdev); 5199a1c3542SAl Viro return blkdev_put(bdev, FMODE_READ|FMODE_WRITE); 520ac27a0ecSDave Kleikamp } 521ac27a0ecSDave Kleikamp 522617ba13bSMingming Cao static int ext4_blkdev_remove(struct ext4_sb_info *sbi) 523ac27a0ecSDave Kleikamp { 524ac27a0ecSDave Kleikamp struct block_device *bdev; 525ac27a0ecSDave Kleikamp int ret = -ENODEV; 526ac27a0ecSDave Kleikamp 527ac27a0ecSDave Kleikamp bdev = sbi->journal_bdev; 528ac27a0ecSDave Kleikamp if (bdev) { 529617ba13bSMingming Cao ret = ext4_blkdev_put(bdev); 530ac27a0ecSDave Kleikamp sbi->journal_bdev = NULL; 531ac27a0ecSDave Kleikamp } 532ac27a0ecSDave Kleikamp return ret; 533ac27a0ecSDave Kleikamp } 534ac27a0ecSDave Kleikamp 535ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 536ac27a0ecSDave Kleikamp { 537617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 538ac27a0ecSDave Kleikamp } 539ac27a0ecSDave Kleikamp 540617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 541ac27a0ecSDave Kleikamp { 542ac27a0ecSDave Kleikamp struct list_head *l; 543ac27a0ecSDave Kleikamp 544ac27a0ecSDave Kleikamp printk(KERN_ERR "sb orphan head is %d\n", 545ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 546ac27a0ecSDave Kleikamp 547ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 548ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 549ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 550ac27a0ecSDave Kleikamp printk(KERN_ERR " " 551ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 552ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 553ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 554ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 555ac27a0ecSDave Kleikamp } 556ac27a0ecSDave Kleikamp } 557ac27a0ecSDave Kleikamp 558617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 559ac27a0ecSDave Kleikamp { 560617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 561617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 562ef2cabf7SHidehiro Kawai int i, err; 563ac27a0ecSDave Kleikamp 564c9de560dSAlex Tomas ext4_mb_release(sb); 565a86c6181SAlex Tomas ext4_ext_release(sb); 566617ba13bSMingming Cao ext4_xattr_put_super(sb); 5670390131bSFrank Mayhar if (sbi->s_journal) { 568ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 56947b4a50bSJan Kara sbi->s_journal = NULL; 570ef2cabf7SHidehiro Kawai if (err < 0) 5710390131bSFrank Mayhar ext4_abort(sb, __func__, 5720390131bSFrank Mayhar "Couldn't clean up the journal"); 5730390131bSFrank Mayhar } 574ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 575617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 576ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 577617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 578ac27a0ecSDave Kleikamp } 579240799cdSTheodore Ts'o if (sbi->s_proc) { 580240799cdSTheodore Ts'o remove_proc_entry("inode_readahead_blks", sbi->s_proc); 5819f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 582240799cdSTheodore Ts'o } 583ac27a0ecSDave Kleikamp 584ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 585ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 586ac27a0ecSDave Kleikamp kfree(sbi->s_group_desc); 587772cb7c8SJose R. Santos kfree(sbi->s_flex_groups); 588ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeblocks_counter); 589ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 590ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 5916bc6e63fSAneesh Kumar K.V percpu_counter_destroy(&sbi->s_dirtyblocks_counter); 592ac27a0ecSDave Kleikamp brelse(sbi->s_sbh); 593ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 594ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 595ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 596ac27a0ecSDave Kleikamp #endif 597ac27a0ecSDave Kleikamp 598ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 599ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 600ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 601ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 602ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 603ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 604ac27a0ecSDave Kleikamp J_ASSERT(list_empty(&sbi->s_orphan)); 605ac27a0ecSDave Kleikamp 606f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 607ac27a0ecSDave Kleikamp if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { 608ac27a0ecSDave Kleikamp /* 609ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 610ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 611ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 612ac27a0ecSDave Kleikamp */ 613ac27a0ecSDave Kleikamp sync_blockdev(sbi->journal_bdev); 614f98393a6SPeter Zijlstra invalidate_bdev(sbi->journal_bdev); 615617ba13bSMingming Cao ext4_blkdev_remove(sbi); 616ac27a0ecSDave Kleikamp } 617ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 618ac27a0ecSDave Kleikamp kfree(sbi); 619ac27a0ecSDave Kleikamp return; 620ac27a0ecSDave Kleikamp } 621ac27a0ecSDave Kleikamp 622e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 623ac27a0ecSDave Kleikamp 624ac27a0ecSDave Kleikamp /* 625ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 626ac27a0ecSDave Kleikamp */ 627617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 628ac27a0ecSDave Kleikamp { 629617ba13bSMingming Cao struct ext4_inode_info *ei; 630ac27a0ecSDave Kleikamp 631e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 632ac27a0ecSDave Kleikamp if (!ei) 633ac27a0ecSDave Kleikamp return NULL; 63403010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 635617ba13bSMingming Cao ei->i_acl = EXT4_ACL_NOT_CACHED; 636617ba13bSMingming Cao ei->i_default_acl = EXT4_ACL_NOT_CACHED; 637ac27a0ecSDave Kleikamp #endif 638ac27a0ecSDave Kleikamp ei->vfs_inode.i_version = 1; 63991246c00SAneesh Kumar K.V ei->vfs_inode.i_data.writeback_index = 0; 640a86c6181SAlex Tomas memset(&ei->i_cached_extent, 0, sizeof(struct ext4_ext_cache)); 641c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 642c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 6430390131bSFrank Mayhar /* 6440390131bSFrank Mayhar * Note: We can be called before EXT4_SB(sb)->s_journal is set, 6450390131bSFrank Mayhar * therefore it can be null here. Don't check it, just initialize 6460390131bSFrank Mayhar * jinode. 6470390131bSFrank Mayhar */ 648678aaf48SJan Kara jbd2_journal_init_jbd_inode(&ei->jinode, &ei->vfs_inode); 649d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 650d2a17637SMingming Cao ei->i_reserved_meta_blocks = 0; 651d2a17637SMingming Cao ei->i_allocated_meta_blocks = 0; 652d2a17637SMingming Cao ei->i_delalloc_reserved_flag = 0; 653d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 654ac27a0ecSDave Kleikamp return &ei->vfs_inode; 655ac27a0ecSDave Kleikamp } 656ac27a0ecSDave Kleikamp 657617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 658ac27a0ecSDave Kleikamp { 6599f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 6609f7dd93dSVasily Averin printk("EXT4 Inode %p: orphan list check failed!\n", 6619f7dd93dSVasily Averin EXT4_I(inode)); 6629f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 6639f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 6649f7dd93dSVasily Averin true); 6659f7dd93dSVasily Averin dump_stack(); 6669f7dd93dSVasily Averin } 667617ba13bSMingming Cao kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 668ac27a0ecSDave Kleikamp } 669ac27a0ecSDave Kleikamp 67051cc5068SAlexey Dobriyan static void init_once(void *foo) 671ac27a0ecSDave Kleikamp { 672617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 673ac27a0ecSDave Kleikamp 674ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 67503010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 676ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 677ac27a0ecSDave Kleikamp #endif 6780e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 679ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 680ac27a0ecSDave Kleikamp } 681ac27a0ecSDave Kleikamp 682ac27a0ecSDave Kleikamp static int init_inodecache(void) 683ac27a0ecSDave Kleikamp { 684617ba13bSMingming Cao ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", 685617ba13bSMingming Cao sizeof(struct ext4_inode_info), 686ac27a0ecSDave Kleikamp 0, (SLAB_RECLAIM_ACCOUNT| 687ac27a0ecSDave Kleikamp SLAB_MEM_SPREAD), 68820c2df83SPaul Mundt init_once); 689617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 690ac27a0ecSDave Kleikamp return -ENOMEM; 691ac27a0ecSDave Kleikamp return 0; 692ac27a0ecSDave Kleikamp } 693ac27a0ecSDave Kleikamp 694ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 695ac27a0ecSDave Kleikamp { 696617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 697ac27a0ecSDave Kleikamp } 698ac27a0ecSDave Kleikamp 699617ba13bSMingming Cao static void ext4_clear_inode(struct inode *inode) 700ac27a0ecSDave Kleikamp { 70103010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 702617ba13bSMingming Cao if (EXT4_I(inode)->i_acl && 703617ba13bSMingming Cao EXT4_I(inode)->i_acl != EXT4_ACL_NOT_CACHED) { 704617ba13bSMingming Cao posix_acl_release(EXT4_I(inode)->i_acl); 705617ba13bSMingming Cao EXT4_I(inode)->i_acl = EXT4_ACL_NOT_CACHED; 706ac27a0ecSDave Kleikamp } 707617ba13bSMingming Cao if (EXT4_I(inode)->i_default_acl && 708617ba13bSMingming Cao EXT4_I(inode)->i_default_acl != EXT4_ACL_NOT_CACHED) { 709617ba13bSMingming Cao posix_acl_release(EXT4_I(inode)->i_default_acl); 710617ba13bSMingming Cao EXT4_I(inode)->i_default_acl = EXT4_ACL_NOT_CACHED; 711ac27a0ecSDave Kleikamp } 712ac27a0ecSDave Kleikamp #endif 713c2ea3fdeSTheodore Ts'o ext4_discard_preallocations(inode); 7140390131bSFrank Mayhar if (EXT4_JOURNAL(inode)) 715678aaf48SJan Kara jbd2_journal_release_jbd_inode(EXT4_SB(inode->i_sb)->s_journal, 716678aaf48SJan Kara &EXT4_I(inode)->jinode); 717ac27a0ecSDave Kleikamp } 718ac27a0ecSDave Kleikamp 7192b2d6d01STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 7202b2d6d01STheodore Ts'o struct super_block *sb) 721ac27a0ecSDave Kleikamp { 722ac27a0ecSDave Kleikamp #if defined(CONFIG_QUOTA) 723617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 724ac27a0ecSDave Kleikamp 725ac27a0ecSDave Kleikamp if (sbi->s_jquota_fmt) 726ac27a0ecSDave Kleikamp seq_printf(seq, ",jqfmt=%s", 727ac27a0ecSDave Kleikamp (sbi->s_jquota_fmt == QFMT_VFS_OLD) ? "vfsold" : "vfsv0"); 728ac27a0ecSDave Kleikamp 729ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA]) 730ac27a0ecSDave Kleikamp seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); 731ac27a0ecSDave Kleikamp 732ac27a0ecSDave Kleikamp if (sbi->s_qf_names[GRPQUOTA]) 733ac27a0ecSDave Kleikamp seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); 734ac27a0ecSDave Kleikamp 735617ba13bSMingming Cao if (sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA) 736ac27a0ecSDave Kleikamp seq_puts(seq, ",usrquota"); 737ac27a0ecSDave Kleikamp 738617ba13bSMingming Cao if (sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA) 739ac27a0ecSDave Kleikamp seq_puts(seq, ",grpquota"); 740ac27a0ecSDave Kleikamp #endif 741ac27a0ecSDave Kleikamp } 742ac27a0ecSDave Kleikamp 743d9c9bef1SMiklos Szeredi /* 744d9c9bef1SMiklos Szeredi * Show an option if 745d9c9bef1SMiklos Szeredi * - it's set to a non-default value OR 746d9c9bef1SMiklos Szeredi * - if the per-sb default is different from the global default 747d9c9bef1SMiklos Szeredi */ 748617ba13bSMingming Cao static int ext4_show_options(struct seq_file *seq, struct vfsmount *vfs) 749ac27a0ecSDave Kleikamp { 750aa22df2cSAneesh Kumar K.V int def_errors; 751aa22df2cSAneesh Kumar K.V unsigned long def_mount_opts; 752ac27a0ecSDave Kleikamp struct super_block *sb = vfs->mnt_sb; 753d9c9bef1SMiklos Szeredi struct ext4_sb_info *sbi = EXT4_SB(sb); 754d9c9bef1SMiklos Szeredi struct ext4_super_block *es = sbi->s_es; 755d9c9bef1SMiklos Szeredi 756d9c9bef1SMiklos Szeredi def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 757aa22df2cSAneesh Kumar K.V def_errors = le16_to_cpu(es->s_errors); 758d9c9bef1SMiklos Szeredi 759d9c9bef1SMiklos Szeredi if (sbi->s_sb_block != 1) 760d9c9bef1SMiklos Szeredi seq_printf(seq, ",sb=%llu", sbi->s_sb_block); 761d9c9bef1SMiklos Szeredi if (test_opt(sb, MINIX_DF)) 762d9c9bef1SMiklos Szeredi seq_puts(seq, ",minixdf"); 763aa22df2cSAneesh Kumar K.V if (test_opt(sb, GRPID) && !(def_mount_opts & EXT4_DEFM_BSDGROUPS)) 764d9c9bef1SMiklos Szeredi seq_puts(seq, ",grpid"); 765d9c9bef1SMiklos Szeredi if (!test_opt(sb, GRPID) && (def_mount_opts & EXT4_DEFM_BSDGROUPS)) 766d9c9bef1SMiklos Szeredi seq_puts(seq, ",nogrpid"); 767d9c9bef1SMiklos Szeredi if (sbi->s_resuid != EXT4_DEF_RESUID || 768d9c9bef1SMiklos Szeredi le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) { 769d9c9bef1SMiklos Szeredi seq_printf(seq, ",resuid=%u", sbi->s_resuid); 770d9c9bef1SMiklos Szeredi } 771d9c9bef1SMiklos Szeredi if (sbi->s_resgid != EXT4_DEF_RESGID || 772d9c9bef1SMiklos Szeredi le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) { 773d9c9bef1SMiklos Szeredi seq_printf(seq, ",resgid=%u", sbi->s_resgid); 774d9c9bef1SMiklos Szeredi } 775bb4f397aSAneesh Kumar K.V if (test_opt(sb, ERRORS_RO)) { 776d9c9bef1SMiklos Szeredi if (def_errors == EXT4_ERRORS_PANIC || 777bb4f397aSAneesh Kumar K.V def_errors == EXT4_ERRORS_CONTINUE) { 778d9c9bef1SMiklos Szeredi seq_puts(seq, ",errors=remount-ro"); 779bb4f397aSAneesh Kumar K.V } 780bb4f397aSAneesh Kumar K.V } 781aa22df2cSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 782bb4f397aSAneesh Kumar K.V seq_puts(seq, ",errors=continue"); 783aa22df2cSAneesh Kumar K.V if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 784d9c9bef1SMiklos Szeredi seq_puts(seq, ",errors=panic"); 785aa22df2cSAneesh Kumar K.V if (test_opt(sb, NO_UID32) && !(def_mount_opts & EXT4_DEFM_UID16)) 786d9c9bef1SMiklos Szeredi seq_puts(seq, ",nouid32"); 787aa22df2cSAneesh Kumar K.V if (test_opt(sb, DEBUG) && !(def_mount_opts & EXT4_DEFM_DEBUG)) 788d9c9bef1SMiklos Szeredi seq_puts(seq, ",debug"); 789d9c9bef1SMiklos Szeredi if (test_opt(sb, OLDALLOC)) 790d9c9bef1SMiklos Szeredi seq_puts(seq, ",oldalloc"); 79103010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 792aa22df2cSAneesh Kumar K.V if (test_opt(sb, XATTR_USER) && 793aa22df2cSAneesh Kumar K.V !(def_mount_opts & EXT4_DEFM_XATTR_USER)) 794d9c9bef1SMiklos Szeredi seq_puts(seq, ",user_xattr"); 795d9c9bef1SMiklos Szeredi if (!test_opt(sb, XATTR_USER) && 796d9c9bef1SMiklos Szeredi (def_mount_opts & EXT4_DEFM_XATTR_USER)) { 797d9c9bef1SMiklos Szeredi seq_puts(seq, ",nouser_xattr"); 798d9c9bef1SMiklos Szeredi } 799d9c9bef1SMiklos Szeredi #endif 80003010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 801aa22df2cSAneesh Kumar K.V if (test_opt(sb, POSIX_ACL) && !(def_mount_opts & EXT4_DEFM_ACL)) 802d9c9bef1SMiklos Szeredi seq_puts(seq, ",acl"); 803d9c9bef1SMiklos Szeredi if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT4_DEFM_ACL)) 804d9c9bef1SMiklos Szeredi seq_puts(seq, ",noacl"); 805d9c9bef1SMiklos Szeredi #endif 806d9c9bef1SMiklos Szeredi if (!test_opt(sb, RESERVATION)) 807d9c9bef1SMiklos Szeredi seq_puts(seq, ",noreservation"); 80830773840STheodore Ts'o if (sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) { 809d9c9bef1SMiklos Szeredi seq_printf(seq, ",commit=%u", 810d9c9bef1SMiklos Szeredi (unsigned) (sbi->s_commit_interval / HZ)); 811d9c9bef1SMiklos Szeredi } 81230773840STheodore Ts'o if (sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) { 81330773840STheodore Ts'o seq_printf(seq, ",min_batch_time=%u", 81430773840STheodore Ts'o (unsigned) sbi->s_min_batch_time); 81530773840STheodore Ts'o } 81630773840STheodore Ts'o if (sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) { 81730773840STheodore Ts'o seq_printf(seq, ",max_batch_time=%u", 81830773840STheodore Ts'o (unsigned) sbi->s_min_batch_time); 81930773840STheodore Ts'o } 82030773840STheodore Ts'o 821571640caSEric Sandeen /* 822571640caSEric Sandeen * We're changing the default of barrier mount option, so 823571640caSEric Sandeen * let's always display its mount state so it's clear what its 824571640caSEric Sandeen * status is. 825571640caSEric Sandeen */ 826571640caSEric Sandeen seq_puts(seq, ",barrier="); 827571640caSEric Sandeen seq_puts(seq, test_opt(sb, BARRIER) ? "1" : "0"); 828cd0b6a39STheodore Ts'o if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) 829cd0b6a39STheodore Ts'o seq_puts(seq, ",journal_async_commit"); 830d9c9bef1SMiklos Szeredi if (test_opt(sb, NOBH)) 831d9c9bef1SMiklos Szeredi seq_puts(seq, ",nobh"); 83225ec56b5SJean Noel Cordenner if (test_opt(sb, I_VERSION)) 83325ec56b5SJean Noel Cordenner seq_puts(seq, ",i_version"); 834dd919b98SAneesh Kumar K.V if (!test_opt(sb, DELALLOC)) 835dd919b98SAneesh Kumar K.V seq_puts(seq, ",nodelalloc"); 836dd919b98SAneesh Kumar K.V 837ac27a0ecSDave Kleikamp 838cb45bbe4SMiklos Szeredi if (sbi->s_stripe) 839cb45bbe4SMiklos Szeredi seq_printf(seq, ",stripe=%lu", sbi->s_stripe); 840aa22df2cSAneesh Kumar K.V /* 841aa22df2cSAneesh Kumar K.V * journal mode get enabled in different ways 842aa22df2cSAneesh Kumar K.V * So just print the value even if we didn't specify it 843aa22df2cSAneesh Kumar K.V */ 844617ba13bSMingming Cao if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 845ac27a0ecSDave Kleikamp seq_puts(seq, ",data=journal"); 846617ba13bSMingming Cao else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 847ac27a0ecSDave Kleikamp seq_puts(seq, ",data=ordered"); 848617ba13bSMingming Cao else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 849ac27a0ecSDave Kleikamp seq_puts(seq, ",data=writeback"); 850ac27a0ecSDave Kleikamp 851240799cdSTheodore Ts'o if (sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 852240799cdSTheodore Ts'o seq_printf(seq, ",inode_readahead_blks=%u", 853240799cdSTheodore Ts'o sbi->s_inode_readahead_blks); 854240799cdSTheodore Ts'o 8555bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 8565bf5683aSHidehiro Kawai seq_puts(seq, ",data_err=abort"); 8575bf5683aSHidehiro Kawai 858617ba13bSMingming Cao ext4_show_quota_options(seq, sb); 859ac27a0ecSDave Kleikamp return 0; 860ac27a0ecSDave Kleikamp } 861ac27a0ecSDave Kleikamp 862ac27a0ecSDave Kleikamp 8631b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 8641b961ac0SChristoph Hellwig u64 ino, u32 generation) 865ac27a0ecSDave Kleikamp { 866ac27a0ecSDave Kleikamp struct inode *inode; 867ac27a0ecSDave Kleikamp 868617ba13bSMingming Cao if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) 869ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 870617ba13bSMingming Cao if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) 871ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 872ac27a0ecSDave Kleikamp 873ac27a0ecSDave Kleikamp /* iget isn't really right if the inode is currently unallocated!! 874ac27a0ecSDave Kleikamp * 875617ba13bSMingming Cao * ext4_read_inode will return a bad_inode if the inode had been 876ac27a0ecSDave Kleikamp * deleted, so we should be safe. 877ac27a0ecSDave Kleikamp * 878ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 879ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 880ac27a0ecSDave Kleikamp */ 8811d1fe1eeSDavid Howells inode = ext4_iget(sb, ino); 8821d1fe1eeSDavid Howells if (IS_ERR(inode)) 8831d1fe1eeSDavid Howells return ERR_CAST(inode); 8841d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 885ac27a0ecSDave Kleikamp iput(inode); 886ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 887ac27a0ecSDave Kleikamp } 8881b961ac0SChristoph Hellwig 8891b961ac0SChristoph Hellwig return inode; 890ac27a0ecSDave Kleikamp } 8911b961ac0SChristoph Hellwig 8921b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 8931b961ac0SChristoph Hellwig int fh_len, int fh_type) 8941b961ac0SChristoph Hellwig { 8951b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 8961b961ac0SChristoph Hellwig ext4_nfs_get_inode); 8971b961ac0SChristoph Hellwig } 8981b961ac0SChristoph Hellwig 8991b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 9001b961ac0SChristoph Hellwig int fh_len, int fh_type) 9011b961ac0SChristoph Hellwig { 9021b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 9031b961ac0SChristoph Hellwig ext4_nfs_get_inode); 904ac27a0ecSDave Kleikamp } 905ac27a0ecSDave Kleikamp 906c39a7f84SToshiyuki Okajima /* 907c39a7f84SToshiyuki Okajima * Try to release metadata pages (indirect blocks, directories) which are 908c39a7f84SToshiyuki Okajima * mapped via the block device. Since these pages could have journal heads 909c39a7f84SToshiyuki Okajima * which would prevent try_to_free_buffers() from freeing them, we must use 910c39a7f84SToshiyuki Okajima * jbd2 layer's try_to_free_buffers() function to release them. 911c39a7f84SToshiyuki Okajima */ 912c39a7f84SToshiyuki Okajima static int bdev_try_to_free_page(struct super_block *sb, struct page *page, gfp_t wait) 913c39a7f84SToshiyuki Okajima { 914c39a7f84SToshiyuki Okajima journal_t *journal = EXT4_SB(sb)->s_journal; 915c39a7f84SToshiyuki Okajima 916c39a7f84SToshiyuki Okajima WARN_ON(PageChecked(page)); 917c39a7f84SToshiyuki Okajima if (!page_has_buffers(page)) 918c39a7f84SToshiyuki Okajima return 0; 919c39a7f84SToshiyuki Okajima if (journal) 920c39a7f84SToshiyuki Okajima return jbd2_journal_try_to_free_buffers(journal, page, 921c39a7f84SToshiyuki Okajima wait & ~__GFP_WAIT); 922c39a7f84SToshiyuki Okajima return try_to_free_buffers(page); 923c39a7f84SToshiyuki Okajima } 924c39a7f84SToshiyuki Okajima 925ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 926ac27a0ecSDave Kleikamp #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") 927ac27a0ecSDave Kleikamp #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) 928ac27a0ecSDave Kleikamp 929617ba13bSMingming Cao static int ext4_dquot_initialize(struct inode *inode, int type); 930617ba13bSMingming Cao static int ext4_dquot_drop(struct inode *inode); 931617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 932617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 933617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 934617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 935617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 9366f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 9376f28e087SJan Kara char *path, int remount); 938617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type); 939617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 940ac27a0ecSDave Kleikamp size_t len, loff_t off); 941617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 942ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 943ac27a0ecSDave Kleikamp 944617ba13bSMingming Cao static struct dquot_operations ext4_quota_operations = { 945617ba13bSMingming Cao .initialize = ext4_dquot_initialize, 946617ba13bSMingming Cao .drop = ext4_dquot_drop, 947ac27a0ecSDave Kleikamp .alloc_space = dquot_alloc_space, 948ac27a0ecSDave Kleikamp .alloc_inode = dquot_alloc_inode, 949ac27a0ecSDave Kleikamp .free_space = dquot_free_space, 950ac27a0ecSDave Kleikamp .free_inode = dquot_free_inode, 951ac27a0ecSDave Kleikamp .transfer = dquot_transfer, 952617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 953617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 954617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 955617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 956a5b5ee32SJan Kara .write_info = ext4_write_info, 957a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 958a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 959ac27a0ecSDave Kleikamp }; 960ac27a0ecSDave Kleikamp 961617ba13bSMingming Cao static struct quotactl_ops ext4_qctl_operations = { 962617ba13bSMingming Cao .quota_on = ext4_quota_on, 963ac27a0ecSDave Kleikamp .quota_off = vfs_quota_off, 964ac27a0ecSDave Kleikamp .quota_sync = vfs_quota_sync, 965ac27a0ecSDave Kleikamp .get_info = vfs_get_dqinfo, 966ac27a0ecSDave Kleikamp .set_info = vfs_set_dqinfo, 967ac27a0ecSDave Kleikamp .get_dqblk = vfs_get_dqblk, 968ac27a0ecSDave Kleikamp .set_dqblk = vfs_set_dqblk 969ac27a0ecSDave Kleikamp }; 970ac27a0ecSDave Kleikamp #endif 971ac27a0ecSDave Kleikamp 972ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 973617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 974617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 975617ba13bSMingming Cao .write_inode = ext4_write_inode, 976617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 977617ba13bSMingming Cao .delete_inode = ext4_delete_inode, 978617ba13bSMingming Cao .put_super = ext4_put_super, 979617ba13bSMingming Cao .write_super = ext4_write_super, 980617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 981*c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 982*c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 983617ba13bSMingming Cao .statfs = ext4_statfs, 984617ba13bSMingming Cao .remount_fs = ext4_remount, 985617ba13bSMingming Cao .clear_inode = ext4_clear_inode, 986617ba13bSMingming Cao .show_options = ext4_show_options, 987ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 988617ba13bSMingming Cao .quota_read = ext4_quota_read, 989617ba13bSMingming Cao .quota_write = ext4_quota_write, 990ac27a0ecSDave Kleikamp #endif 991c39a7f84SToshiyuki Okajima .bdev_try_to_free_page = bdev_try_to_free_page, 992ac27a0ecSDave Kleikamp }; 993ac27a0ecSDave Kleikamp 99439655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 9951b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 9961b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 997617ba13bSMingming Cao .get_parent = ext4_get_parent, 998ac27a0ecSDave Kleikamp }; 999ac27a0ecSDave Kleikamp 1000ac27a0ecSDave Kleikamp enum { 1001ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1002ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 100301436ef2STheodore Ts'o Opt_nouid32, Opt_debug, Opt_oldalloc, Opt_orlov, 1004ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 1005ac27a0ecSDave Kleikamp Opt_reservation, Opt_noreservation, Opt_noload, Opt_nobh, Opt_bh, 100630773840STheodore Ts'o Opt_commit, Opt_min_batch_time, Opt_max_batch_time, 1007c3191067STheodore Ts'o Opt_journal_update, Opt_journal_dev, 1008818d276cSGirish Shilamkar Opt_journal_checksum, Opt_journal_async_commit, 1009ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 10105bf5683aSHidehiro Kawai Opt_data_err_abort, Opt_data_err_ignore, 1011ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 1012ac27a0ecSDave Kleikamp Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_quota, Opt_noquota, 1013ac27a0ecSDave Kleikamp Opt_ignore, Opt_barrier, Opt_err, Opt_resize, Opt_usrquota, 101483982b6fSTheodore Ts'o Opt_grpquota, Opt_i_version, 101501436ef2STheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, 1016b3881f74STheodore Ts'o Opt_inode_readahead_blks, Opt_journal_ioprio 1017ac27a0ecSDave Kleikamp }; 1018ac27a0ecSDave Kleikamp 1019a447c093SSteven Whitehouse static const match_table_t tokens = { 1020ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1021ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1022ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1023ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1024ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1025ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1026ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1027ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1028ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1029ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1030ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1031ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1032ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1033ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 1034ac27a0ecSDave Kleikamp {Opt_oldalloc, "oldalloc"}, 1035ac27a0ecSDave Kleikamp {Opt_orlov, "orlov"}, 1036ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1037ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1038ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1039ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1040ac27a0ecSDave Kleikamp {Opt_reservation, "reservation"}, 1041ac27a0ecSDave Kleikamp {Opt_noreservation, "noreservation"}, 1042ac27a0ecSDave Kleikamp {Opt_noload, "noload"}, 1043ac27a0ecSDave Kleikamp {Opt_nobh, "nobh"}, 1044ac27a0ecSDave Kleikamp {Opt_bh, "bh"}, 1045ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 104630773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 104730773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1048ac27a0ecSDave Kleikamp {Opt_journal_update, "journal=update"}, 1049ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1050818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1051818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1052ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1053ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1054ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1055ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 10565bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 10575bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1058ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1059ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1060ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1061ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1062ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1063ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 1064ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1065ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1066ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1067ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 1068ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 106925ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1070c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 1071ac27a0ecSDave Kleikamp {Opt_resize, "resize"}, 107264769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1073dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 1074240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1075b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1076f3f12faaSJosef Bacik {Opt_err, NULL}, 1077ac27a0ecSDave Kleikamp }; 1078ac27a0ecSDave Kleikamp 1079617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 1080ac27a0ecSDave Kleikamp { 1081617ba13bSMingming Cao ext4_fsblk_t sb_block; 1082ac27a0ecSDave Kleikamp char *options = (char *) *data; 1083ac27a0ecSDave Kleikamp 1084ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 1085ac27a0ecSDave Kleikamp return 1; /* Default location */ 1086ac27a0ecSDave Kleikamp options += 3; 1087617ba13bSMingming Cao /*todo: use simple_strtoll with >32bit ext4 */ 1088ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 1089ac27a0ecSDave Kleikamp if (*options && *options != ',') { 10904776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 1091ac27a0ecSDave Kleikamp (char *) *data); 1092ac27a0ecSDave Kleikamp return 1; 1093ac27a0ecSDave Kleikamp } 1094ac27a0ecSDave Kleikamp if (*options == ',') 1095ac27a0ecSDave Kleikamp options++; 1096ac27a0ecSDave Kleikamp *data = (void *) options; 1097ac27a0ecSDave Kleikamp return sb_block; 1098ac27a0ecSDave Kleikamp } 1099ac27a0ecSDave Kleikamp 1100b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1101b3881f74STheodore Ts'o 1102ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 1103c3191067STheodore Ts'o unsigned long *journal_devnum, 1104b3881f74STheodore Ts'o unsigned int *journal_ioprio, 1105617ba13bSMingming Cao ext4_fsblk_t *n_blocks_count, int is_remount) 1106ac27a0ecSDave Kleikamp { 1107617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1108ac27a0ecSDave Kleikamp char *p; 1109ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 1110ac27a0ecSDave Kleikamp int data_opt = 0; 1111ac27a0ecSDave Kleikamp int option; 1112ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1113dfc5d03fSJan Kara int qtype, qfmt; 1114ac27a0ecSDave Kleikamp char *qname; 1115ac27a0ecSDave Kleikamp #endif 1116ac27a0ecSDave Kleikamp 1117ac27a0ecSDave Kleikamp if (!options) 1118ac27a0ecSDave Kleikamp return 1; 1119ac27a0ecSDave Kleikamp 1120ac27a0ecSDave Kleikamp while ((p = strsep(&options, ",")) != NULL) { 1121ac27a0ecSDave Kleikamp int token; 1122ac27a0ecSDave Kleikamp if (!*p) 1123ac27a0ecSDave Kleikamp continue; 1124ac27a0ecSDave Kleikamp 1125ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 1126ac27a0ecSDave Kleikamp switch (token) { 1127ac27a0ecSDave Kleikamp case Opt_bsd_df: 1128ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, MINIX_DF); 1129ac27a0ecSDave Kleikamp break; 1130ac27a0ecSDave Kleikamp case Opt_minix_df: 1131ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, MINIX_DF); 1132ac27a0ecSDave Kleikamp break; 1133ac27a0ecSDave Kleikamp case Opt_grpid: 1134ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, GRPID); 1135ac27a0ecSDave Kleikamp break; 1136ac27a0ecSDave Kleikamp case Opt_nogrpid: 1137ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, GRPID); 1138ac27a0ecSDave Kleikamp break; 1139ac27a0ecSDave Kleikamp case Opt_resuid: 1140ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1141ac27a0ecSDave Kleikamp return 0; 1142ac27a0ecSDave Kleikamp sbi->s_resuid = option; 1143ac27a0ecSDave Kleikamp break; 1144ac27a0ecSDave Kleikamp case Opt_resgid: 1145ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1146ac27a0ecSDave Kleikamp return 0; 1147ac27a0ecSDave Kleikamp sbi->s_resgid = option; 1148ac27a0ecSDave Kleikamp break; 1149ac27a0ecSDave Kleikamp case Opt_sb: 1150ac27a0ecSDave Kleikamp /* handled by get_sb_block() instead of here */ 1151ac27a0ecSDave Kleikamp /* *sb_block = match_int(&args[0]); */ 1152ac27a0ecSDave Kleikamp break; 1153ac27a0ecSDave Kleikamp case Opt_err_panic: 1154ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_CONT); 1155ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_RO); 1156ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_PANIC); 1157ac27a0ecSDave Kleikamp break; 1158ac27a0ecSDave Kleikamp case Opt_err_ro: 1159ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_CONT); 1160ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_PANIC); 1161ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_RO); 1162ac27a0ecSDave Kleikamp break; 1163ac27a0ecSDave Kleikamp case Opt_err_cont: 1164ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_RO); 1165ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, ERRORS_PANIC); 1166ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_CONT); 1167ac27a0ecSDave Kleikamp break; 1168ac27a0ecSDave Kleikamp case Opt_nouid32: 1169ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NO_UID32); 1170ac27a0ecSDave Kleikamp break; 1171ac27a0ecSDave Kleikamp case Opt_debug: 1172ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, DEBUG); 1173ac27a0ecSDave Kleikamp break; 1174ac27a0ecSDave Kleikamp case Opt_oldalloc: 1175ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, OLDALLOC); 1176ac27a0ecSDave Kleikamp break; 1177ac27a0ecSDave Kleikamp case Opt_orlov: 1178ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, OLDALLOC); 1179ac27a0ecSDave Kleikamp break; 118003010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 1181ac27a0ecSDave Kleikamp case Opt_user_xattr: 1182ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, XATTR_USER); 1183ac27a0ecSDave Kleikamp break; 1184ac27a0ecSDave Kleikamp case Opt_nouser_xattr: 1185ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, XATTR_USER); 1186ac27a0ecSDave Kleikamp break; 1187ac27a0ecSDave Kleikamp #else 1188ac27a0ecSDave Kleikamp case Opt_user_xattr: 1189ac27a0ecSDave Kleikamp case Opt_nouser_xattr: 11904776004fSTheodore Ts'o printk(KERN_ERR "EXT4 (no)user_xattr options " 11914776004fSTheodore Ts'o "not supported\n"); 1192ac27a0ecSDave Kleikamp break; 1193ac27a0ecSDave Kleikamp #endif 119403010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 1195ac27a0ecSDave Kleikamp case Opt_acl: 1196ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, POSIX_ACL); 1197ac27a0ecSDave Kleikamp break; 1198ac27a0ecSDave Kleikamp case Opt_noacl: 1199ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, POSIX_ACL); 1200ac27a0ecSDave Kleikamp break; 1201ac27a0ecSDave Kleikamp #else 1202ac27a0ecSDave Kleikamp case Opt_acl: 1203ac27a0ecSDave Kleikamp case Opt_noacl: 12044776004fSTheodore Ts'o printk(KERN_ERR "EXT4 (no)acl options " 12054776004fSTheodore Ts'o "not supported\n"); 1206ac27a0ecSDave Kleikamp break; 1207ac27a0ecSDave Kleikamp #endif 1208ac27a0ecSDave Kleikamp case Opt_reservation: 1209ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, RESERVATION); 1210ac27a0ecSDave Kleikamp break; 1211ac27a0ecSDave Kleikamp case Opt_noreservation: 1212ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, RESERVATION); 1213ac27a0ecSDave Kleikamp break; 1214ac27a0ecSDave Kleikamp case Opt_journal_update: 1215ac27a0ecSDave Kleikamp /* @@@ FIXME */ 1216ac27a0ecSDave Kleikamp /* Eventually we will want to be able to create 1217ac27a0ecSDave Kleikamp a journal file here. For now, only allow the 1218ac27a0ecSDave Kleikamp user to specify an existing inode to be the 1219ac27a0ecSDave Kleikamp journal file. */ 1220ac27a0ecSDave Kleikamp if (is_remount) { 1221617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: cannot specify " 1222ac27a0ecSDave Kleikamp "journal on remount\n"); 1223ac27a0ecSDave Kleikamp return 0; 1224ac27a0ecSDave Kleikamp } 1225ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, UPDATE_JOURNAL); 1226ac27a0ecSDave Kleikamp break; 1227ac27a0ecSDave Kleikamp case Opt_journal_dev: 1228ac27a0ecSDave Kleikamp if (is_remount) { 1229617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: cannot specify " 1230ac27a0ecSDave Kleikamp "journal on remount\n"); 1231ac27a0ecSDave Kleikamp return 0; 1232ac27a0ecSDave Kleikamp } 1233ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1234ac27a0ecSDave Kleikamp return 0; 1235ac27a0ecSDave Kleikamp *journal_devnum = option; 1236ac27a0ecSDave Kleikamp break; 1237818d276cSGirish Shilamkar case Opt_journal_checksum: 1238818d276cSGirish Shilamkar set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); 1239818d276cSGirish Shilamkar break; 1240818d276cSGirish Shilamkar case Opt_journal_async_commit: 1241818d276cSGirish Shilamkar set_opt(sbi->s_mount_opt, JOURNAL_ASYNC_COMMIT); 1242818d276cSGirish Shilamkar set_opt(sbi->s_mount_opt, JOURNAL_CHECKSUM); 1243818d276cSGirish Shilamkar break; 1244ac27a0ecSDave Kleikamp case Opt_noload: 1245ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NOLOAD); 1246ac27a0ecSDave Kleikamp break; 1247ac27a0ecSDave Kleikamp case Opt_commit: 1248ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1249ac27a0ecSDave Kleikamp return 0; 1250ac27a0ecSDave Kleikamp if (option < 0) 1251ac27a0ecSDave Kleikamp return 0; 1252ac27a0ecSDave Kleikamp if (option == 0) 1253cd02ff0bSMingming Cao option = JBD2_DEFAULT_MAX_COMMIT_AGE; 1254ac27a0ecSDave Kleikamp sbi->s_commit_interval = HZ * option; 1255ac27a0ecSDave Kleikamp break; 125630773840STheodore Ts'o case Opt_max_batch_time: 125730773840STheodore Ts'o if (match_int(&args[0], &option)) 125830773840STheodore Ts'o return 0; 125930773840STheodore Ts'o if (option < 0) 126030773840STheodore Ts'o return 0; 126130773840STheodore Ts'o if (option == 0) 126230773840STheodore Ts'o option = EXT4_DEF_MAX_BATCH_TIME; 126330773840STheodore Ts'o sbi->s_max_batch_time = option; 126430773840STheodore Ts'o break; 126530773840STheodore Ts'o case Opt_min_batch_time: 126630773840STheodore Ts'o if (match_int(&args[0], &option)) 126730773840STheodore Ts'o return 0; 126830773840STheodore Ts'o if (option < 0) 126930773840STheodore Ts'o return 0; 127030773840STheodore Ts'o sbi->s_min_batch_time = option; 127130773840STheodore Ts'o break; 1272ac27a0ecSDave Kleikamp case Opt_data_journal: 1273617ba13bSMingming Cao data_opt = EXT4_MOUNT_JOURNAL_DATA; 1274ac27a0ecSDave Kleikamp goto datacheck; 1275ac27a0ecSDave Kleikamp case Opt_data_ordered: 1276617ba13bSMingming Cao data_opt = EXT4_MOUNT_ORDERED_DATA; 1277ac27a0ecSDave Kleikamp goto datacheck; 1278ac27a0ecSDave Kleikamp case Opt_data_writeback: 1279617ba13bSMingming Cao data_opt = EXT4_MOUNT_WRITEBACK_DATA; 1280ac27a0ecSDave Kleikamp datacheck: 1281ac27a0ecSDave Kleikamp if (is_remount) { 1282617ba13bSMingming Cao if ((sbi->s_mount_opt & EXT4_MOUNT_DATA_FLAGS) 1283ac27a0ecSDave Kleikamp != data_opt) { 1284ac27a0ecSDave Kleikamp printk(KERN_ERR 1285617ba13bSMingming Cao "EXT4-fs: cannot change data " 1286ac27a0ecSDave Kleikamp "mode on remount\n"); 1287ac27a0ecSDave Kleikamp return 0; 1288ac27a0ecSDave Kleikamp } 1289ac27a0ecSDave Kleikamp } else { 1290617ba13bSMingming Cao sbi->s_mount_opt &= ~EXT4_MOUNT_DATA_FLAGS; 1291ac27a0ecSDave Kleikamp sbi->s_mount_opt |= data_opt; 1292ac27a0ecSDave Kleikamp } 1293ac27a0ecSDave Kleikamp break; 12945bf5683aSHidehiro Kawai case Opt_data_err_abort: 12955bf5683aSHidehiro Kawai set_opt(sbi->s_mount_opt, DATA_ERR_ABORT); 12965bf5683aSHidehiro Kawai break; 12975bf5683aSHidehiro Kawai case Opt_data_err_ignore: 12985bf5683aSHidehiro Kawai clear_opt(sbi->s_mount_opt, DATA_ERR_ABORT); 12995bf5683aSHidehiro Kawai break; 1300ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1301ac27a0ecSDave Kleikamp case Opt_usrjquota: 1302ac27a0ecSDave Kleikamp qtype = USRQUOTA; 1303ac27a0ecSDave Kleikamp goto set_qf_name; 1304ac27a0ecSDave Kleikamp case Opt_grpjquota: 1305ac27a0ecSDave Kleikamp qtype = GRPQUOTA; 1306ac27a0ecSDave Kleikamp set_qf_name: 130717bd13b3SJan Kara if (sb_any_quota_loaded(sb) && 1308dfc5d03fSJan Kara !sbi->s_qf_names[qtype]) { 1309ac27a0ecSDave Kleikamp printk(KERN_ERR 13102c8be6b2SJan Kara "EXT4-fs: Cannot change journaled " 1311ac27a0ecSDave Kleikamp "quota options when quota turned on.\n"); 1312ac27a0ecSDave Kleikamp return 0; 1313ac27a0ecSDave Kleikamp } 1314ac27a0ecSDave Kleikamp qname = match_strdup(&args[0]); 1315ac27a0ecSDave Kleikamp if (!qname) { 1316ac27a0ecSDave Kleikamp printk(KERN_ERR 1317617ba13bSMingming Cao "EXT4-fs: not enough memory for " 1318ac27a0ecSDave Kleikamp "storing quotafile name.\n"); 1319ac27a0ecSDave Kleikamp return 0; 1320ac27a0ecSDave Kleikamp } 1321ac27a0ecSDave Kleikamp if (sbi->s_qf_names[qtype] && 1322ac27a0ecSDave Kleikamp strcmp(sbi->s_qf_names[qtype], qname)) { 1323ac27a0ecSDave Kleikamp printk(KERN_ERR 1324617ba13bSMingming Cao "EXT4-fs: %s quota file already " 1325ac27a0ecSDave Kleikamp "specified.\n", QTYPE2NAME(qtype)); 1326ac27a0ecSDave Kleikamp kfree(qname); 1327ac27a0ecSDave Kleikamp return 0; 1328ac27a0ecSDave Kleikamp } 1329ac27a0ecSDave Kleikamp sbi->s_qf_names[qtype] = qname; 1330ac27a0ecSDave Kleikamp if (strchr(sbi->s_qf_names[qtype], '/')) { 1331ac27a0ecSDave Kleikamp printk(KERN_ERR 1332617ba13bSMingming Cao "EXT4-fs: quotafile must be on " 1333ac27a0ecSDave Kleikamp "filesystem root.\n"); 1334ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[qtype]); 1335ac27a0ecSDave Kleikamp sbi->s_qf_names[qtype] = NULL; 1336ac27a0ecSDave Kleikamp return 0; 1337ac27a0ecSDave Kleikamp } 1338ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, QUOTA); 1339ac27a0ecSDave Kleikamp break; 1340ac27a0ecSDave Kleikamp case Opt_offusrjquota: 1341ac27a0ecSDave Kleikamp qtype = USRQUOTA; 1342ac27a0ecSDave Kleikamp goto clear_qf_name; 1343ac27a0ecSDave Kleikamp case Opt_offgrpjquota: 1344ac27a0ecSDave Kleikamp qtype = GRPQUOTA; 1345ac27a0ecSDave Kleikamp clear_qf_name: 134617bd13b3SJan Kara if (sb_any_quota_loaded(sb) && 1347dfc5d03fSJan Kara sbi->s_qf_names[qtype]) { 1348617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: Cannot change " 13492c8be6b2SJan Kara "journaled quota options when " 1350ac27a0ecSDave Kleikamp "quota turned on.\n"); 1351ac27a0ecSDave Kleikamp return 0; 1352ac27a0ecSDave Kleikamp } 1353ac27a0ecSDave Kleikamp /* 1354ac27a0ecSDave Kleikamp * The space will be released later when all options 1355ac27a0ecSDave Kleikamp * are confirmed to be correct 1356ac27a0ecSDave Kleikamp */ 1357ac27a0ecSDave Kleikamp sbi->s_qf_names[qtype] = NULL; 1358ac27a0ecSDave Kleikamp break; 1359ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsold: 1360dfc5d03fSJan Kara qfmt = QFMT_VFS_OLD; 1361dfc5d03fSJan Kara goto set_qf_format; 1362ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsv0: 1363dfc5d03fSJan Kara qfmt = QFMT_VFS_V0; 1364dfc5d03fSJan Kara set_qf_format: 136517bd13b3SJan Kara if (sb_any_quota_loaded(sb) && 1366dfc5d03fSJan Kara sbi->s_jquota_fmt != qfmt) { 1367dfc5d03fSJan Kara printk(KERN_ERR "EXT4-fs: Cannot change " 1368dfc5d03fSJan Kara "journaled quota options when " 1369dfc5d03fSJan Kara "quota turned on.\n"); 1370dfc5d03fSJan Kara return 0; 1371dfc5d03fSJan Kara } 1372dfc5d03fSJan Kara sbi->s_jquota_fmt = qfmt; 1373ac27a0ecSDave Kleikamp break; 1374ac27a0ecSDave Kleikamp case Opt_quota: 1375ac27a0ecSDave Kleikamp case Opt_usrquota: 1376ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, QUOTA); 1377ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, USRQUOTA); 1378ac27a0ecSDave Kleikamp break; 1379ac27a0ecSDave Kleikamp case Opt_grpquota: 1380ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, QUOTA); 1381ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, GRPQUOTA); 1382ac27a0ecSDave Kleikamp break; 1383ac27a0ecSDave Kleikamp case Opt_noquota: 138417bd13b3SJan Kara if (sb_any_quota_loaded(sb)) { 1385617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: Cannot change quota " 1386ac27a0ecSDave Kleikamp "options when quota turned on.\n"); 1387ac27a0ecSDave Kleikamp return 0; 1388ac27a0ecSDave Kleikamp } 1389ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, QUOTA); 1390ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, USRQUOTA); 1391ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, GRPQUOTA); 1392ac27a0ecSDave Kleikamp break; 1393ac27a0ecSDave Kleikamp #else 1394ac27a0ecSDave Kleikamp case Opt_quota: 1395ac27a0ecSDave Kleikamp case Opt_usrquota: 1396ac27a0ecSDave Kleikamp case Opt_grpquota: 1397cd59e7b9SJan Kara printk(KERN_ERR 1398cd59e7b9SJan Kara "EXT4-fs: quota options not supported.\n"); 1399cd59e7b9SJan Kara break; 1400ac27a0ecSDave Kleikamp case Opt_usrjquota: 1401ac27a0ecSDave Kleikamp case Opt_grpjquota: 1402ac27a0ecSDave Kleikamp case Opt_offusrjquota: 1403ac27a0ecSDave Kleikamp case Opt_offgrpjquota: 1404ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsold: 1405ac27a0ecSDave Kleikamp case Opt_jqfmt_vfsv0: 1406ac27a0ecSDave Kleikamp printk(KERN_ERR 1407cd59e7b9SJan Kara "EXT4-fs: journaled quota options not " 1408ac27a0ecSDave Kleikamp "supported.\n"); 1409ac27a0ecSDave Kleikamp break; 1410ac27a0ecSDave Kleikamp case Opt_noquota: 1411ac27a0ecSDave Kleikamp break; 1412ac27a0ecSDave Kleikamp #endif 1413ac27a0ecSDave Kleikamp case Opt_abort: 1414ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ABORT); 1415ac27a0ecSDave Kleikamp break; 1416ac27a0ecSDave Kleikamp case Opt_barrier: 1417ac27a0ecSDave Kleikamp if (match_int(&args[0], &option)) 1418ac27a0ecSDave Kleikamp return 0; 1419ac27a0ecSDave Kleikamp if (option) 1420ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, BARRIER); 1421ac27a0ecSDave Kleikamp else 1422ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, BARRIER); 1423ac27a0ecSDave Kleikamp break; 1424ac27a0ecSDave Kleikamp case Opt_ignore: 1425ac27a0ecSDave Kleikamp break; 1426ac27a0ecSDave Kleikamp case Opt_resize: 1427ac27a0ecSDave Kleikamp if (!is_remount) { 1428617ba13bSMingming Cao printk("EXT4-fs: resize option only available " 1429ac27a0ecSDave Kleikamp "for remount\n"); 1430ac27a0ecSDave Kleikamp return 0; 1431ac27a0ecSDave Kleikamp } 1432ac27a0ecSDave Kleikamp if (match_int(&args[0], &option) != 0) 1433ac27a0ecSDave Kleikamp return 0; 1434ac27a0ecSDave Kleikamp *n_blocks_count = option; 1435ac27a0ecSDave Kleikamp break; 1436ac27a0ecSDave Kleikamp case Opt_nobh: 1437ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NOBH); 1438ac27a0ecSDave Kleikamp break; 1439ac27a0ecSDave Kleikamp case Opt_bh: 1440ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, NOBH); 1441ac27a0ecSDave Kleikamp break; 144225ec56b5SJean Noel Cordenner case Opt_i_version: 144325ec56b5SJean Noel Cordenner set_opt(sbi->s_mount_opt, I_VERSION); 144425ec56b5SJean Noel Cordenner sb->s_flags |= MS_I_VERSION; 144525ec56b5SJean Noel Cordenner break; 1446dd919b98SAneesh Kumar K.V case Opt_nodelalloc: 1447dd919b98SAneesh Kumar K.V clear_opt(sbi->s_mount_opt, DELALLOC); 1448dd919b98SAneesh Kumar K.V break; 1449c9de560dSAlex Tomas case Opt_stripe: 1450c9de560dSAlex Tomas if (match_int(&args[0], &option)) 1451c9de560dSAlex Tomas return 0; 1452c9de560dSAlex Tomas if (option < 0) 1453c9de560dSAlex Tomas return 0; 1454c9de560dSAlex Tomas sbi->s_stripe = option; 1455c9de560dSAlex Tomas break; 145664769240SAlex Tomas case Opt_delalloc: 145764769240SAlex Tomas set_opt(sbi->s_mount_opt, DELALLOC); 145864769240SAlex Tomas break; 1459240799cdSTheodore Ts'o case Opt_inode_readahead_blks: 1460240799cdSTheodore Ts'o if (match_int(&args[0], &option)) 1461240799cdSTheodore Ts'o return 0; 1462240799cdSTheodore Ts'o if (option < 0 || option > (1 << 30)) 1463240799cdSTheodore Ts'o return 0; 1464240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = option; 1465240799cdSTheodore Ts'o break; 1466b3881f74STheodore Ts'o case Opt_journal_ioprio: 1467b3881f74STheodore Ts'o if (match_int(&args[0], &option)) 1468b3881f74STheodore Ts'o return 0; 1469b3881f74STheodore Ts'o if (option < 0 || option > 7) 1470b3881f74STheodore Ts'o break; 1471b3881f74STheodore Ts'o *journal_ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 1472b3881f74STheodore Ts'o option); 1473b3881f74STheodore Ts'o break; 1474ac27a0ecSDave Kleikamp default: 1475ac27a0ecSDave Kleikamp printk(KERN_ERR 1476617ba13bSMingming Cao "EXT4-fs: Unrecognized mount option \"%s\" " 1477ac27a0ecSDave Kleikamp "or missing value\n", p); 1478ac27a0ecSDave Kleikamp return 0; 1479ac27a0ecSDave Kleikamp } 1480ac27a0ecSDave Kleikamp } 1481ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1482ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 1483617ba13bSMingming Cao if ((sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA) && 1484ac27a0ecSDave Kleikamp sbi->s_qf_names[USRQUOTA]) 1485ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, USRQUOTA); 1486ac27a0ecSDave Kleikamp 1487617ba13bSMingming Cao if ((sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA) && 1488ac27a0ecSDave Kleikamp sbi->s_qf_names[GRPQUOTA]) 1489ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, GRPQUOTA); 1490ac27a0ecSDave Kleikamp 1491ac27a0ecSDave Kleikamp if ((sbi->s_qf_names[USRQUOTA] && 1492617ba13bSMingming Cao (sbi->s_mount_opt & EXT4_MOUNT_GRPQUOTA)) || 1493ac27a0ecSDave Kleikamp (sbi->s_qf_names[GRPQUOTA] && 1494617ba13bSMingming Cao (sbi->s_mount_opt & EXT4_MOUNT_USRQUOTA))) { 1495617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: old and new quota " 1496ac27a0ecSDave Kleikamp "format mixing.\n"); 1497ac27a0ecSDave Kleikamp return 0; 1498ac27a0ecSDave Kleikamp } 1499ac27a0ecSDave Kleikamp 1500ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 15012c8be6b2SJan Kara printk(KERN_ERR "EXT4-fs: journaled quota format " 1502ac27a0ecSDave Kleikamp "not specified.\n"); 1503ac27a0ecSDave Kleikamp return 0; 1504ac27a0ecSDave Kleikamp } 1505ac27a0ecSDave Kleikamp } else { 1506ac27a0ecSDave Kleikamp if (sbi->s_jquota_fmt) { 15072c8be6b2SJan Kara printk(KERN_ERR "EXT4-fs: journaled quota format " 15082c8be6b2SJan Kara "specified with no journaling " 1509ac27a0ecSDave Kleikamp "enabled.\n"); 1510ac27a0ecSDave Kleikamp return 0; 1511ac27a0ecSDave Kleikamp } 1512ac27a0ecSDave Kleikamp } 1513ac27a0ecSDave Kleikamp #endif 1514ac27a0ecSDave Kleikamp return 1; 1515ac27a0ecSDave Kleikamp } 1516ac27a0ecSDave Kleikamp 1517617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 1518ac27a0ecSDave Kleikamp int read_only) 1519ac27a0ecSDave Kleikamp { 1520617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1521ac27a0ecSDave Kleikamp int res = 0; 1522ac27a0ecSDave Kleikamp 1523617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 1524617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs warning: revision level too high, " 1525ac27a0ecSDave Kleikamp "forcing read-only mode\n"); 1526ac27a0ecSDave Kleikamp res = MS_RDONLY; 1527ac27a0ecSDave Kleikamp } 1528ac27a0ecSDave Kleikamp if (read_only) 1529ac27a0ecSDave Kleikamp return res; 1530617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 1531617ba13bSMingming Cao printk(KERN_WARNING "EXT4-fs warning: mounting unchecked fs, " 1532ac27a0ecSDave Kleikamp "running e2fsck is recommended\n"); 1533617ba13bSMingming Cao else if ((sbi->s_mount_state & EXT4_ERROR_FS)) 1534ac27a0ecSDave Kleikamp printk(KERN_WARNING 1535617ba13bSMingming Cao "EXT4-fs warning: mounting fs with errors, " 1536ac27a0ecSDave Kleikamp "running e2fsck is recommended\n"); 1537ac27a0ecSDave Kleikamp else if ((__s16) le16_to_cpu(es->s_max_mnt_count) >= 0 && 1538ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 1539ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 1540ac27a0ecSDave Kleikamp printk(KERN_WARNING 1541617ba13bSMingming Cao "EXT4-fs warning: maximal mount count reached, " 1542ac27a0ecSDave Kleikamp "running e2fsck is recommended\n"); 1543ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 1544ac27a0ecSDave Kleikamp (le32_to_cpu(es->s_lastcheck) + 1545ac27a0ecSDave Kleikamp le32_to_cpu(es->s_checkinterval) <= get_seconds())) 1546ac27a0ecSDave Kleikamp printk(KERN_WARNING 1547617ba13bSMingming Cao "EXT4-fs warning: checktime reached, " 1548ac27a0ecSDave Kleikamp "running e2fsck is recommended\n"); 15490390131bSFrank Mayhar if (!sbi->s_journal) 1550216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 1551ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 1552617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 1553e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 1554ac27a0ecSDave Kleikamp es->s_mtime = cpu_to_le32(get_seconds()); 1555617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 15560390131bSFrank Mayhar if (sbi->s_journal) 1557617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 1558ac27a0ecSDave Kleikamp 1559617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 1560ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 1561a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 1562ac27a0ecSDave Kleikamp "bpg=%lu, ipg=%lu, mo=%04lx]\n", 1563ac27a0ecSDave Kleikamp sb->s_blocksize, 1564ac27a0ecSDave Kleikamp sbi->s_groups_count, 1565617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 1566617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 1567ac27a0ecSDave Kleikamp sbi->s_mount_opt); 1568ac27a0ecSDave Kleikamp 15690390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 157005496769STheodore Ts'o printk(KERN_INFO "EXT4 FS on %s, %s journal on %s\n", 157105496769STheodore Ts'o sb->s_id, EXT4_SB(sb)->s_journal->j_inode ? "internal" : 157205496769STheodore Ts'o "external", EXT4_SB(sb)->s_journal->j_devname); 15730390131bSFrank Mayhar } else { 15740390131bSFrank Mayhar printk(KERN_INFO "EXT4 FS on %s, no journal\n", sb->s_id); 15750390131bSFrank Mayhar } 1576ac27a0ecSDave Kleikamp return res; 1577ac27a0ecSDave Kleikamp } 1578ac27a0ecSDave Kleikamp 1579772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 1580772cb7c8SJose R. Santos { 1581772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 1582772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 1583772cb7c8SJose R. Santos struct buffer_head *bh; 1584772cb7c8SJose R. Santos ext4_group_t flex_group_count; 1585772cb7c8SJose R. Santos ext4_group_t flex_group; 1586772cb7c8SJose R. Santos int groups_per_flex = 0; 1587772cb7c8SJose R. Santos int i; 1588772cb7c8SJose R. Santos 1589772cb7c8SJose R. Santos if (!sbi->s_es->s_log_groups_per_flex) { 1590772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 1591772cb7c8SJose R. Santos return 1; 1592772cb7c8SJose R. Santos } 1593772cb7c8SJose R. Santos 1594772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 1595772cb7c8SJose R. Santos groups_per_flex = 1 << sbi->s_log_groups_per_flex; 1596772cb7c8SJose R. Santos 1597c62a11fdSFrederic Bohe /* We allocate both existing and potentially added groups */ 1598c62a11fdSFrederic Bohe flex_group_count = ((sbi->s_groups_count + groups_per_flex - 1) + 1599d94e99a6SAneesh Kumar K.V ((le16_to_cpu(sbi->s_es->s_reserved_gdt_blocks) + 1) << 1600d94e99a6SAneesh Kumar K.V EXT4_DESC_PER_BLOCK_BITS(sb))) / groups_per_flex; 1601ec05e868SLi Zefan sbi->s_flex_groups = kzalloc(flex_group_count * 1602772cb7c8SJose R. Santos sizeof(struct flex_groups), GFP_KERNEL); 1603772cb7c8SJose R. Santos if (sbi->s_flex_groups == NULL) { 1604ec05e868SLi Zefan printk(KERN_ERR "EXT4-fs: not enough memory for " 1605a9df9a49STheodore Ts'o "%u flex groups\n", flex_group_count); 1606772cb7c8SJose R. Santos goto failed; 1607772cb7c8SJose R. Santos } 1608772cb7c8SJose R. Santos 1609772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 1610772cb7c8SJose R. Santos gdp = ext4_get_group_desc(sb, i, &bh); 1611772cb7c8SJose R. Santos 1612772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 1613772cb7c8SJose R. Santos sbi->s_flex_groups[flex_group].free_inodes += 1614560671a0SAneesh Kumar K.V ext4_free_inodes_count(sb, gdp); 1615772cb7c8SJose R. Santos sbi->s_flex_groups[flex_group].free_blocks += 1616560671a0SAneesh Kumar K.V ext4_free_blks_count(sb, gdp); 1617772cb7c8SJose R. Santos } 1618772cb7c8SJose R. Santos 1619772cb7c8SJose R. Santos return 1; 1620772cb7c8SJose R. Santos failed: 1621772cb7c8SJose R. Santos return 0; 1622772cb7c8SJose R. Santos } 1623772cb7c8SJose R. Santos 1624717d50e4SAndreas Dilger __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, 1625717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1626717d50e4SAndreas Dilger { 1627717d50e4SAndreas Dilger __u16 crc = 0; 1628717d50e4SAndreas Dilger 1629717d50e4SAndreas Dilger if (sbi->s_es->s_feature_ro_compat & 1630717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) { 1631717d50e4SAndreas Dilger int offset = offsetof(struct ext4_group_desc, bg_checksum); 1632717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 1633717d50e4SAndreas Dilger 1634717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 1635717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 1636717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 1637717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 1638717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 1639717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_incompat & 1640717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && 1641717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 1642717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 1643717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 1644717d50e4SAndreas Dilger offset); 1645717d50e4SAndreas Dilger } 1646717d50e4SAndreas Dilger 1647717d50e4SAndreas Dilger return cpu_to_le16(crc); 1648717d50e4SAndreas Dilger } 1649717d50e4SAndreas Dilger 1650717d50e4SAndreas Dilger int ext4_group_desc_csum_verify(struct ext4_sb_info *sbi, __u32 block_group, 1651717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 1652717d50e4SAndreas Dilger { 1653717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_ro_compat & 1654717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) && 1655717d50e4SAndreas Dilger (gdp->bg_checksum != ext4_group_desc_csum(sbi, block_group, gdp))) 1656717d50e4SAndreas Dilger return 0; 1657717d50e4SAndreas Dilger 1658717d50e4SAndreas Dilger return 1; 1659717d50e4SAndreas Dilger } 1660717d50e4SAndreas Dilger 1661ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 1662617ba13bSMingming Cao static int ext4_check_descriptors(struct super_block *sb) 1663ac27a0ecSDave Kleikamp { 1664617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1665617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 1666617ba13bSMingming Cao ext4_fsblk_t last_block; 1667bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 1668bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 1669bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 1670ce421581SJose R. Santos int flexbg_flag = 0; 1671fd2d4291SAvantika Mathur ext4_group_t i; 1672ac27a0ecSDave Kleikamp 1673ce421581SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 1674ce421581SJose R. Santos flexbg_flag = 1; 1675ce421581SJose R. Santos 1676617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 1677ac27a0ecSDave Kleikamp 1678197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 1679197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 1680197cd65aSAkinobu Mita 1681ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 1682bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 1683ac27a0ecSDave Kleikamp else 1684ac27a0ecSDave Kleikamp last_block = first_block + 1685617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 1686ac27a0ecSDave Kleikamp 16878fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 16882b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 1689c19204b0SJosef Bacik printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " 1690a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 16915128273aSEric Sesterhenn "(block %llu)!\n", i, block_bitmap); 1692ac27a0ecSDave Kleikamp return 0; 1693ac27a0ecSDave Kleikamp } 16948fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 16952b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 1696c19204b0SJosef Bacik printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " 1697a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 16985128273aSEric Sesterhenn "(block %llu)!\n", i, inode_bitmap); 1699ac27a0ecSDave Kleikamp return 0; 1700ac27a0ecSDave Kleikamp } 17018fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 1702bd81d8eeSLaurent Vivier if (inode_table < first_block || 17032b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 1704c19204b0SJosef Bacik printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " 1705a9df9a49STheodore Ts'o "Inode table for group %u not in group " 17065128273aSEric Sesterhenn "(block %llu)!\n", i, inode_table); 1707ac27a0ecSDave Kleikamp return 0; 1708ac27a0ecSDave Kleikamp } 1709b5f10eedSEric Sandeen spin_lock(sb_bgl_lock(sbi, i)); 1710717d50e4SAndreas Dilger if (!ext4_group_desc_csum_verify(sbi, i, gdp)) { 1711c19204b0SJosef Bacik printk(KERN_ERR "EXT4-fs: ext4_check_descriptors: " 1712a9df9a49STheodore Ts'o "Checksum for group %u failed (%u!=%u)\n", 1713fd2d4291SAvantika Mathur i, le16_to_cpu(ext4_group_desc_csum(sbi, i, 1714fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 17157ee1ec4cSLi Zefan if (!(sb->s_flags & MS_RDONLY)) { 17167ee1ec4cSLi Zefan spin_unlock(sb_bgl_lock(sbi, i)); 1717717d50e4SAndreas Dilger return 0; 1718717d50e4SAndreas Dilger } 17197ee1ec4cSLi Zefan } 1720b5f10eedSEric Sandeen spin_unlock(sb_bgl_lock(sbi, i)); 1721ce421581SJose R. Santos if (!flexbg_flag) 1722617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 1723ac27a0ecSDave Kleikamp } 1724ac27a0ecSDave Kleikamp 1725bd81d8eeSLaurent Vivier ext4_free_blocks_count_set(sbi->s_es, ext4_count_free_blocks(sb)); 1726617ba13bSMingming Cao sbi->s_es->s_free_inodes_count = cpu_to_le32(ext4_count_free_inodes(sb)); 1727ac27a0ecSDave Kleikamp return 1; 1728ac27a0ecSDave Kleikamp } 1729ac27a0ecSDave Kleikamp 1730617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 1731ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 1732ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 1733ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 1734ac27a0ecSDave Kleikamp * 1735ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 1736ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 1737ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 1738ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 1739ac27a0ecSDave Kleikamp * 1740ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 1741ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 1742ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 1743617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 1744ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 1745ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 1746ac27a0ecSDave Kleikamp */ 1747617ba13bSMingming Cao static void ext4_orphan_cleanup(struct super_block *sb, 1748617ba13bSMingming Cao struct ext4_super_block *es) 1749ac27a0ecSDave Kleikamp { 1750ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 1751ac27a0ecSDave Kleikamp int nr_orphans = 0, nr_truncates = 0; 1752ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1753ac27a0ecSDave Kleikamp int i; 1754ac27a0ecSDave Kleikamp #endif 1755ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 1756ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 1757ac27a0ecSDave Kleikamp return; 1758ac27a0ecSDave Kleikamp } 1759ac27a0ecSDave Kleikamp 1760a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 1761a8f48a95SEric Sandeen printk(KERN_ERR "EXT4-fs: write access " 1762a8f48a95SEric Sandeen "unavailable, skipping orphan cleanup.\n"); 1763a8f48a95SEric Sandeen return; 1764a8f48a95SEric Sandeen } 1765a8f48a95SEric Sandeen 1766617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 1767ac27a0ecSDave Kleikamp if (es->s_last_orphan) 1768ac27a0ecSDave Kleikamp jbd_debug(1, "Errors on filesystem, " 1769ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 1770ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 1771ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 1772ac27a0ecSDave Kleikamp return; 1773ac27a0ecSDave Kleikamp } 1774ac27a0ecSDave Kleikamp 1775ac27a0ecSDave Kleikamp if (s_flags & MS_RDONLY) { 1776617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: %s: orphan cleanup on readonly fs\n", 1777ac27a0ecSDave Kleikamp sb->s_id); 1778ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 1779ac27a0ecSDave Kleikamp } 1780ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1781ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 1782ac27a0ecSDave Kleikamp sb->s_flags |= MS_ACTIVE; 1783ac27a0ecSDave Kleikamp /* Turn on quotas so that they are updated correctly */ 1784ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 1785617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 1786617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 1787ac27a0ecSDave Kleikamp if (ret < 0) 1788ac27a0ecSDave Kleikamp printk(KERN_ERR 17892c8be6b2SJan Kara "EXT4-fs: Cannot turn on journaled " 1790ac27a0ecSDave Kleikamp "quota: error %d\n", ret); 1791ac27a0ecSDave Kleikamp } 1792ac27a0ecSDave Kleikamp } 1793ac27a0ecSDave Kleikamp #endif 1794ac27a0ecSDave Kleikamp 1795ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 1796ac27a0ecSDave Kleikamp struct inode *inode; 1797ac27a0ecSDave Kleikamp 179897bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 179997bd42b9SJosef Bacik if (IS_ERR(inode)) { 1800ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 1801ac27a0ecSDave Kleikamp break; 1802ac27a0ecSDave Kleikamp } 1803ac27a0ecSDave Kleikamp 1804617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 1805ac27a0ecSDave Kleikamp DQUOT_INIT(inode); 1806ac27a0ecSDave Kleikamp if (inode->i_nlink) { 1807ac27a0ecSDave Kleikamp printk(KERN_DEBUG 1808e5f8eab8STheodore Ts'o "%s: truncating inode %lu to %lld bytes\n", 180946e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 1810e5f8eab8STheodore Ts'o jbd_debug(2, "truncating inode %lu to %lld bytes\n", 1811ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 1812617ba13bSMingming Cao ext4_truncate(inode); 1813ac27a0ecSDave Kleikamp nr_truncates++; 1814ac27a0ecSDave Kleikamp } else { 1815ac27a0ecSDave Kleikamp printk(KERN_DEBUG 1816ac27a0ecSDave Kleikamp "%s: deleting unreferenced inode %lu\n", 181746e665e9SHarvey Harrison __func__, inode->i_ino); 1818ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 1819ac27a0ecSDave Kleikamp inode->i_ino); 1820ac27a0ecSDave Kleikamp nr_orphans++; 1821ac27a0ecSDave Kleikamp } 1822ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 1823ac27a0ecSDave Kleikamp } 1824ac27a0ecSDave Kleikamp 1825ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x) == 1) ? "" : "s" 1826ac27a0ecSDave Kleikamp 1827ac27a0ecSDave Kleikamp if (nr_orphans) 1828617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: %s: %d orphan inode%s deleted\n", 1829ac27a0ecSDave Kleikamp sb->s_id, PLURAL(nr_orphans)); 1830ac27a0ecSDave Kleikamp if (nr_truncates) 1831617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: %s: %d truncate%s cleaned up\n", 1832ac27a0ecSDave Kleikamp sb->s_id, PLURAL(nr_truncates)); 1833ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1834ac27a0ecSDave Kleikamp /* Turn quotas off */ 1835ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 1836ac27a0ecSDave Kleikamp if (sb_dqopt(sb)->files[i]) 18376f28e087SJan Kara vfs_quota_off(sb, i, 0); 1838ac27a0ecSDave Kleikamp } 1839ac27a0ecSDave Kleikamp #endif 1840ac27a0ecSDave Kleikamp sb->s_flags = s_flags; /* Restore MS_RDONLY status */ 1841ac27a0ecSDave Kleikamp } 1842cd2291a4SEric Sandeen /* 1843cd2291a4SEric Sandeen * Maximal extent format file size. 1844cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 1845cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 1846cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 1847cd2291a4SEric Sandeen * so that won't be a limiting factor. 1848cd2291a4SEric Sandeen * 1849cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 1850cd2291a4SEric Sandeen */ 1851f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 1852cd2291a4SEric Sandeen { 1853cd2291a4SEric Sandeen loff_t res; 1854cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 1855cd2291a4SEric Sandeen 1856cd2291a4SEric Sandeen /* small i_blocks in vfs inode? */ 1857f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 1858cd2291a4SEric Sandeen /* 1859b3a6ffe1SJens Axboe * CONFIG_LBD is not enabled implies the inode 1860cd2291a4SEric Sandeen * i_block represent total blocks in 512 bytes 1861cd2291a4SEric Sandeen * 32 == size of vfs inode i_blocks * 8 1862cd2291a4SEric Sandeen */ 1863cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 1864cd2291a4SEric Sandeen 1865cd2291a4SEric Sandeen /* total blocks in file system block size */ 1866cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 1867cd2291a4SEric Sandeen upper_limit <<= blkbits; 1868cd2291a4SEric Sandeen } 1869cd2291a4SEric Sandeen 1870cd2291a4SEric Sandeen /* 32-bit extent-start container, ee_block */ 1871cd2291a4SEric Sandeen res = 1LL << 32; 1872cd2291a4SEric Sandeen res <<= blkbits; 1873cd2291a4SEric Sandeen res -= 1; 1874cd2291a4SEric Sandeen 1875cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 1876cd2291a4SEric Sandeen if (res > upper_limit) 1877cd2291a4SEric Sandeen res = upper_limit; 1878cd2291a4SEric Sandeen 1879cd2291a4SEric Sandeen return res; 1880cd2291a4SEric Sandeen } 1881ac27a0ecSDave Kleikamp 1882ac27a0ecSDave Kleikamp /* 1883cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 18840fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 18850fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 1886ac27a0ecSDave Kleikamp */ 1887f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 1888ac27a0ecSDave Kleikamp { 1889617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 18900fc1b451SAneesh Kumar K.V int meta_blocks; 18910fc1b451SAneesh Kumar K.V loff_t upper_limit; 18920fc1b451SAneesh Kumar K.V /* This is calculated to be the largest file size for a 1893cd2291a4SEric Sandeen * dense, bitmapped file such that the total number of 1894ac27a0ecSDave Kleikamp * sectors in the file, including data and all indirect blocks, 18950fc1b451SAneesh Kumar K.V * does not exceed 2^48 -1 18960fc1b451SAneesh Kumar K.V * __u32 i_blocks_lo and _u16 i_blocks_high representing the 18970fc1b451SAneesh Kumar K.V * total number of 512 bytes blocks of the file 18980fc1b451SAneesh Kumar K.V */ 18990fc1b451SAneesh Kumar K.V 1900f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 19010fc1b451SAneesh Kumar K.V /* 1902b3a6ffe1SJens Axboe * !has_huge_files or CONFIG_LBD is not enabled 1903f287a1a5STheodore Ts'o * implies the inode i_block represent total blocks in 1904f287a1a5STheodore Ts'o * 512 bytes 32 == size of vfs inode i_blocks * 8 19050fc1b451SAneesh Kumar K.V */ 19060fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 19070fc1b451SAneesh Kumar K.V 19080fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 19090fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 19100fc1b451SAneesh Kumar K.V 19110fc1b451SAneesh Kumar K.V } else { 19128180a562SAneesh Kumar K.V /* 19138180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 19148180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 19158180a562SAneesh Kumar K.V * represent total number of blocks in 19168180a562SAneesh Kumar K.V * file system block size 19178180a562SAneesh Kumar K.V */ 19180fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 19190fc1b451SAneesh Kumar K.V 19200fc1b451SAneesh Kumar K.V } 19210fc1b451SAneesh Kumar K.V 19220fc1b451SAneesh Kumar K.V /* indirect blocks */ 19230fc1b451SAneesh Kumar K.V meta_blocks = 1; 19240fc1b451SAneesh Kumar K.V /* double indirect blocks */ 19250fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 19260fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 19270fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 19280fc1b451SAneesh Kumar K.V 19290fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 19300fc1b451SAneesh Kumar K.V upper_limit <<= bits; 1931ac27a0ecSDave Kleikamp 1932ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 1933ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 1934ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 1935ac27a0ecSDave Kleikamp res <<= bits; 1936ac27a0ecSDave Kleikamp if (res > upper_limit) 1937ac27a0ecSDave Kleikamp res = upper_limit; 19380fc1b451SAneesh Kumar K.V 19390fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 19400fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 19410fc1b451SAneesh Kumar K.V 1942ac27a0ecSDave Kleikamp return res; 1943ac27a0ecSDave Kleikamp } 1944ac27a0ecSDave Kleikamp 1945617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 194670bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 1947ac27a0ecSDave Kleikamp { 1948617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1949fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 1950ac27a0ecSDave Kleikamp int has_super = 0; 1951ac27a0ecSDave Kleikamp 1952ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 1953ac27a0ecSDave Kleikamp 1954617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || 1955ac27a0ecSDave Kleikamp nr < first_meta_bg) 195670bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 1957ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 1958617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 1959ac27a0ecSDave Kleikamp has_super = 1; 1960617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 1961ac27a0ecSDave Kleikamp } 1962ac27a0ecSDave Kleikamp 1963c9de560dSAlex Tomas /** 1964c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 1965c9de560dSAlex Tomas * @sbi: In memory super block info 1966c9de560dSAlex Tomas * 1967c9de560dSAlex Tomas * If we have specified it via mount option, then 1968c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 1969c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 1970c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 1971c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 1972c9de560dSAlex Tomas * 1973c9de560dSAlex Tomas */ 1974c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 1975c9de560dSAlex Tomas { 1976c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 1977c9de560dSAlex Tomas unsigned long stripe_width = 1978c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 1979c9de560dSAlex Tomas 1980c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 1981c9de560dSAlex Tomas return sbi->s_stripe; 1982c9de560dSAlex Tomas 1983c9de560dSAlex Tomas if (stripe_width <= sbi->s_blocks_per_group) 1984c9de560dSAlex Tomas return stripe_width; 1985c9de560dSAlex Tomas 1986c9de560dSAlex Tomas if (stride <= sbi->s_blocks_per_group) 1987c9de560dSAlex Tomas return stride; 1988c9de560dSAlex Tomas 1989c9de560dSAlex Tomas return 0; 1990c9de560dSAlex Tomas } 1991ac27a0ecSDave Kleikamp 1992617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 19937477827fSAneesh Kumar K.V __releases(kernel_lock) 19947477827fSAneesh Kumar K.V __acquires(kernel_lock) 19951d03ec98SAneesh Kumar K.V 1996ac27a0ecSDave Kleikamp { 1997ac27a0ecSDave Kleikamp struct buffer_head *bh; 1998617ba13bSMingming Cao struct ext4_super_block *es = NULL; 1999617ba13bSMingming Cao struct ext4_sb_info *sbi; 2000617ba13bSMingming Cao ext4_fsblk_t block; 2001617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 200270bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 2003ac27a0ecSDave Kleikamp unsigned long offset = 0; 2004ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 2005ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 2006ac27a0ecSDave Kleikamp struct inode *root; 20079f6200bbSTheodore Ts'o char *cp; 20080390131bSFrank Mayhar const char *descr; 20091d1fe1eeSDavid Howells int ret = -EINVAL; 2010ac27a0ecSDave Kleikamp int blocksize; 20114ec11028STheodore Ts'o unsigned int db_count; 20124ec11028STheodore Ts'o unsigned int i; 2013f287a1a5STheodore Ts'o int needs_recovery, has_huge_files; 20143a06d778SAneesh Kumar K.V int features; 2015bd81d8eeSLaurent Vivier __u64 blocks_count; 2016833f4077SPeter Zijlstra int err; 2017b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 2018ac27a0ecSDave Kleikamp 2019ac27a0ecSDave Kleikamp sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 2020ac27a0ecSDave Kleikamp if (!sbi) 2021ac27a0ecSDave Kleikamp return -ENOMEM; 2022ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 2023ac27a0ecSDave Kleikamp sbi->s_mount_opt = 0; 2024617ba13bSMingming Cao sbi->s_resuid = EXT4_DEF_RESUID; 2025617ba13bSMingming Cao sbi->s_resgid = EXT4_DEF_RESGID; 2026240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 2027d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 2028ac27a0ecSDave Kleikamp 2029ac27a0ecSDave Kleikamp unlock_kernel(); 2030ac27a0ecSDave Kleikamp 20319f6200bbSTheodore Ts'o /* Cleanup superblock name */ 20329f6200bbSTheodore Ts'o for (cp = sb->s_id; (cp = strchr(cp, '/'));) 20339f6200bbSTheodore Ts'o *cp = '!'; 20349f6200bbSTheodore Ts'o 2035617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 2036ac27a0ecSDave Kleikamp if (!blocksize) { 2037617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: unable to set blocksize\n"); 2038ac27a0ecSDave Kleikamp goto out_fail; 2039ac27a0ecSDave Kleikamp } 2040ac27a0ecSDave Kleikamp 2041ac27a0ecSDave Kleikamp /* 2042617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 2043ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 2044ac27a0ecSDave Kleikamp */ 2045617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 204670bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 204770bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 2048ac27a0ecSDave Kleikamp } else { 204970bbb3e0SAndrew Morton logical_sb_block = sb_block; 2050ac27a0ecSDave Kleikamp } 2051ac27a0ecSDave Kleikamp 205270bbb3e0SAndrew Morton if (!(bh = sb_bread(sb, logical_sb_block))) { 2053617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: unable to read superblock\n"); 2054ac27a0ecSDave Kleikamp goto out_fail; 2055ac27a0ecSDave Kleikamp } 2056ac27a0ecSDave Kleikamp /* 2057ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 2058617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 2059ac27a0ecSDave Kleikamp */ 2060617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 2061ac27a0ecSDave Kleikamp sbi->s_es = es; 2062ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 2063617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 2064617ba13bSMingming Cao goto cantfind_ext4; 2065ac27a0ecSDave Kleikamp 2066ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 2067ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 2068617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 2069ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, DEBUG); 2070617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 2071ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, GRPID); 2072617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 2073ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, NO_UID32); 207403010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_XATTR 2075617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_XATTR_USER) 2076ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, XATTR_USER); 20772e7842b8SHugh Dickins #endif 207803010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 2079617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_ACL) 2080ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, POSIX_ACL); 20812e7842b8SHugh Dickins #endif 2082617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 2083617ba13bSMingming Cao sbi->s_mount_opt |= EXT4_MOUNT_JOURNAL_DATA; 2084617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 2085617ba13bSMingming Cao sbi->s_mount_opt |= EXT4_MOUNT_ORDERED_DATA; 2086617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 2087617ba13bSMingming Cao sbi->s_mount_opt |= EXT4_MOUNT_WRITEBACK_DATA; 2088ac27a0ecSDave Kleikamp 2089617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 2090ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ERRORS_PANIC); 2091bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 2092ceea16bfSDmitry Mishin set_opt(sbi->s_mount_opt, ERRORS_CONT); 2093bb4f397aSAneesh Kumar K.V else 2094bb4f397aSAneesh Kumar K.V set_opt(sbi->s_mount_opt, ERRORS_RO); 2095ac27a0ecSDave Kleikamp 2096ac27a0ecSDave Kleikamp sbi->s_resuid = le16_to_cpu(es->s_def_resuid); 2097ac27a0ecSDave Kleikamp sbi->s_resgid = le16_to_cpu(es->s_def_resgid); 209830773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 209930773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 210030773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 2101ac27a0ecSDave Kleikamp 2102ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, RESERVATION); 2103571640caSEric Sandeen set_opt(sbi->s_mount_opt, BARRIER); 2104ac27a0ecSDave Kleikamp 21051e2462f9SMingming Cao /* 2106dd919b98SAneesh Kumar K.V * enable delayed allocation by default 2107dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 2108dd919b98SAneesh Kumar K.V */ 2109dd919b98SAneesh Kumar K.V set_opt(sbi->s_mount_opt, DELALLOC); 2110dd919b98SAneesh Kumar K.V 2111dd919b98SAneesh Kumar K.V 2112b3881f74STheodore Ts'o if (!parse_options((char *) data, sb, &journal_devnum, 2113b3881f74STheodore Ts'o &journal_ioprio, NULL, 0)) 2114ac27a0ecSDave Kleikamp goto failed_mount; 2115ac27a0ecSDave Kleikamp 2116ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 2117617ba13bSMingming Cao ((sbi->s_mount_opt & EXT4_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); 2118ac27a0ecSDave Kleikamp 2119617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 2120617ba13bSMingming Cao (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || 2121617ba13bSMingming Cao EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || 2122617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) 2123ac27a0ecSDave Kleikamp printk(KERN_WARNING 2124617ba13bSMingming Cao "EXT4-fs warning: feature flags set on rev 0 fs, " 2125ac27a0ecSDave Kleikamp "running e2fsck is recommended\n"); 2126469108ffSTheodore Tso 2127469108ffSTheodore Tso /* 2128ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 2129ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 2130ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 2131ac27a0ecSDave Kleikamp */ 2132617ba13bSMingming Cao features = EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP); 2133ac27a0ecSDave Kleikamp if (features) { 2134617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: %s: couldn't mount because of " 21353a06d778SAneesh Kumar K.V "unsupported optional features (%x).\n", sb->s_id, 21363a06d778SAneesh Kumar K.V (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 21373a06d778SAneesh Kumar K.V ~EXT4_FEATURE_INCOMPAT_SUPP)); 2138ac27a0ecSDave Kleikamp goto failed_mount; 2139ac27a0ecSDave Kleikamp } 2140617ba13bSMingming Cao features = EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP); 2141ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY) && features) { 2142617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: %s: couldn't mount RDWR because of " 21433a06d778SAneesh Kumar K.V "unsupported optional features (%x).\n", sb->s_id, 21443a06d778SAneesh Kumar K.V (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 21453a06d778SAneesh Kumar K.V ~EXT4_FEATURE_RO_COMPAT_SUPP)); 2146ac27a0ecSDave Kleikamp goto failed_mount; 2147ac27a0ecSDave Kleikamp } 2148f287a1a5STheodore Ts'o has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, 2149f287a1a5STheodore Ts'o EXT4_FEATURE_RO_COMPAT_HUGE_FILE); 2150f287a1a5STheodore Ts'o if (has_huge_files) { 21510fc1b451SAneesh Kumar K.V /* 21520fc1b451SAneesh Kumar K.V * Large file size enabled file system can only be 2153b3a6ffe1SJens Axboe * mount if kernel is build with CONFIG_LBD 21540fc1b451SAneesh Kumar K.V */ 21550fc1b451SAneesh Kumar K.V if (sizeof(root->i_blocks) < sizeof(u64) && 21560fc1b451SAneesh Kumar K.V !(sb->s_flags & MS_RDONLY)) { 21570fc1b451SAneesh Kumar K.V printk(KERN_ERR "EXT4-fs: %s: Filesystem with huge " 21580fc1b451SAneesh Kumar K.V "files cannot be mounted read-write " 2159b3a6ffe1SJens Axboe "without CONFIG_LBD.\n", sb->s_id); 21600fc1b451SAneesh Kumar K.V goto failed_mount; 21610fc1b451SAneesh Kumar K.V } 21620fc1b451SAneesh Kumar K.V } 2163ac27a0ecSDave Kleikamp blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 2164ac27a0ecSDave Kleikamp 2165617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 2166617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 2167ac27a0ecSDave Kleikamp printk(KERN_ERR 2168617ba13bSMingming Cao "EXT4-fs: Unsupported filesystem blocksize %d on %s.\n", 2169ac27a0ecSDave Kleikamp blocksize, sb->s_id); 2170ac27a0ecSDave Kleikamp goto failed_mount; 2171ac27a0ecSDave Kleikamp } 2172ac27a0ecSDave Kleikamp 2173ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 2174ce40733cSAneesh Kumar K.V 2175ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 2176ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 2177ce40733cSAneesh Kumar K.V printk(KERN_ERR "EXT4-fs: bad block size %d.\n", 2178ce40733cSAneesh Kumar K.V blocksize); 2179ac27a0ecSDave Kleikamp goto failed_mount; 2180ac27a0ecSDave Kleikamp } 2181ac27a0ecSDave Kleikamp 2182ac27a0ecSDave Kleikamp brelse(bh); 218370bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 218470bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 218570bbb3e0SAndrew Morton bh = sb_bread(sb, logical_sb_block); 2186ac27a0ecSDave Kleikamp if (!bh) { 2187ac27a0ecSDave Kleikamp printk(KERN_ERR 2188617ba13bSMingming Cao "EXT4-fs: Can't read superblock on 2nd try.\n"); 2189ac27a0ecSDave Kleikamp goto failed_mount; 2190ac27a0ecSDave Kleikamp } 2191617ba13bSMingming Cao es = (struct ext4_super_block *)(((char *)bh->b_data) + offset); 2192ac27a0ecSDave Kleikamp sbi->s_es = es; 2193617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 2194ac27a0ecSDave Kleikamp printk(KERN_ERR 2195617ba13bSMingming Cao "EXT4-fs: Magic mismatch, very weird !\n"); 2196ac27a0ecSDave Kleikamp goto failed_mount; 2197ac27a0ecSDave Kleikamp } 2198ac27a0ecSDave Kleikamp } 2199ac27a0ecSDave Kleikamp 2200f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 2201f287a1a5STheodore Ts'o has_huge_files); 2202f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 2203ac27a0ecSDave Kleikamp 2204617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 2205617ba13bSMingming Cao sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 2206617ba13bSMingming Cao sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 2207ac27a0ecSDave Kleikamp } else { 2208ac27a0ecSDave Kleikamp sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 2209ac27a0ecSDave Kleikamp sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 2210617ba13bSMingming Cao if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 22111330593eSVignesh Babu (!is_power_of_2(sbi->s_inode_size)) || 2212ac27a0ecSDave Kleikamp (sbi->s_inode_size > blocksize)) { 2213ac27a0ecSDave Kleikamp printk(KERN_ERR 2214617ba13bSMingming Cao "EXT4-fs: unsupported inode size: %d\n", 2215ac27a0ecSDave Kleikamp sbi->s_inode_size); 2216ac27a0ecSDave Kleikamp goto failed_mount; 2217ac27a0ecSDave Kleikamp } 2218ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) 2219ef7f3835SKalpak Shah sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); 2220ac27a0ecSDave Kleikamp } 22210d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 22220d1ee42fSAlexandre Ratchov if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { 22238fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 22240d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 2225d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 22260d1ee42fSAlexandre Ratchov printk(KERN_ERR 22278fadc143SAlexandre Ratchov "EXT4-fs: unsupported descriptor size %lu\n", 22280d1ee42fSAlexandre Ratchov sbi->s_desc_size); 22290d1ee42fSAlexandre Ratchov goto failed_mount; 22300d1ee42fSAlexandre Ratchov } 22310d1ee42fSAlexandre Ratchov } else 22320d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 2233ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 2234ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 2235b47b6f38SAndries E. Brouwer if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) 2236617ba13bSMingming Cao goto cantfind_ext4; 2237617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 2238ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 2239617ba13bSMingming Cao goto cantfind_ext4; 2240ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 2241ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 22420d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 2243ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 2244ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 2245e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 2246e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 2247ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 2248ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 2249ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 2250f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 2251f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 2252f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 2253f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 2254f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 2255f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 2256f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 2257f99b2589STheodore Ts'o #else 2258f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 2259f99b2589STheodore Ts'o #endif 2260f99b2589STheodore Ts'o sb->s_dirt = 1; 2261f99b2589STheodore Ts'o } 2262ac27a0ecSDave Kleikamp 2263ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 2264ac27a0ecSDave Kleikamp printk(KERN_ERR 2265617ba13bSMingming Cao "EXT4-fs: #blocks per group too big: %lu\n", 2266ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 2267ac27a0ecSDave Kleikamp goto failed_mount; 2268ac27a0ecSDave Kleikamp } 2269ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_group > blocksize * 8) { 2270ac27a0ecSDave Kleikamp printk(KERN_ERR 2271617ba13bSMingming Cao "EXT4-fs: #inodes per group too big: %lu\n", 2272ac27a0ecSDave Kleikamp sbi->s_inodes_per_group); 2273ac27a0ecSDave Kleikamp goto failed_mount; 2274ac27a0ecSDave Kleikamp } 2275ac27a0ecSDave Kleikamp 2276bd81d8eeSLaurent Vivier if (ext4_blocks_count(es) > 2277ac27a0ecSDave Kleikamp (sector_t)(~0ULL) >> (sb->s_blocksize_bits - 9)) { 2278617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: filesystem on %s:" 2279ac27a0ecSDave Kleikamp " too large to mount safely\n", sb->s_id); 2280ac27a0ecSDave Kleikamp if (sizeof(sector_t) < 8) 2281617ba13bSMingming Cao printk(KERN_WARNING "EXT4-fs: CONFIG_LBD not " 2282ac27a0ecSDave Kleikamp "enabled\n"); 2283ac27a0ecSDave Kleikamp goto failed_mount; 2284ac27a0ecSDave Kleikamp } 2285ac27a0ecSDave Kleikamp 2286617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 2287617ba13bSMingming Cao goto cantfind_ext4; 2288e7c95593SEric Sandeen 22894ec11028STheodore Ts'o /* 22904ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 22914ec11028STheodore Ts'o * of the filesystem. 22924ec11028STheodore Ts'o */ 22934ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 22944ec11028STheodore Ts'o printk(KERN_WARNING "EXT4-fs: bad geometry: first data" 22954ec11028STheodore Ts'o "block %u is beyond end of filesystem (%llu)\n", 2296e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 22974ec11028STheodore Ts'o ext4_blocks_count(es)); 2298e7c95593SEric Sandeen goto failed_mount; 2299e7c95593SEric Sandeen } 2300bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 2301bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 2302bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 2303bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 23044ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 23054ec11028STheodore Ts'o printk(KERN_WARNING "EXT4-fs: groups count too large: %u " 23064ec11028STheodore Ts'o "(block count %llu, first data block %u, " 23074ec11028STheodore Ts'o "blocks per group %lu)\n", sbi->s_groups_count, 23084ec11028STheodore Ts'o ext4_blocks_count(es), 23094ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 23104ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 23114ec11028STheodore Ts'o goto failed_mount; 23124ec11028STheodore Ts'o } 2313bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 2314617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 2315617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 2316ac27a0ecSDave Kleikamp sbi->s_group_desc = kmalloc(db_count * sizeof(struct buffer_head *), 2317ac27a0ecSDave Kleikamp GFP_KERNEL); 2318ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 2319617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: not enough memory\n"); 2320ac27a0ecSDave Kleikamp goto failed_mount; 2321ac27a0ecSDave Kleikamp } 2322ac27a0ecSDave Kleikamp 23233244fcb1SAlexander Beregalov #ifdef CONFIG_PROC_FS 23249f6200bbSTheodore Ts'o if (ext4_proc_root) 23259f6200bbSTheodore Ts'o sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); 23269f6200bbSTheodore Ts'o 2327240799cdSTheodore Ts'o if (sbi->s_proc) 2328240799cdSTheodore Ts'o proc_create_data("inode_readahead_blks", 0644, sbi->s_proc, 2329240799cdSTheodore Ts'o &ext4_ui_proc_fops, 2330240799cdSTheodore Ts'o &sbi->s_inode_readahead_blks); 23313244fcb1SAlexander Beregalov #endif 2332240799cdSTheodore Ts'o 2333ac27a0ecSDave Kleikamp bgl_lock_init(&sbi->s_blockgroup_lock); 2334ac27a0ecSDave Kleikamp 2335ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 233670bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 2337ac27a0ecSDave Kleikamp sbi->s_group_desc[i] = sb_bread(sb, block); 2338ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 2339617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: " 2340ac27a0ecSDave Kleikamp "can't read group descriptor %d\n", i); 2341ac27a0ecSDave Kleikamp db_count = i; 2342ac27a0ecSDave Kleikamp goto failed_mount2; 2343ac27a0ecSDave Kleikamp } 2344ac27a0ecSDave Kleikamp } 2345617ba13bSMingming Cao if (!ext4_check_descriptors(sb)) { 2346617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: group descriptors corrupted!\n"); 2347ac27a0ecSDave Kleikamp goto failed_mount2; 2348ac27a0ecSDave Kleikamp } 2349772cb7c8SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 2350772cb7c8SJose R. Santos if (!ext4_fill_flex_info(sb)) { 2351772cb7c8SJose R. Santos printk(KERN_ERR 2352772cb7c8SJose R. Santos "EXT4-fs: unable to initialize " 2353772cb7c8SJose R. Santos "flex_bg meta info!\n"); 2354772cb7c8SJose R. Santos goto failed_mount2; 2355772cb7c8SJose R. Santos } 2356772cb7c8SJose R. Santos 2357ac27a0ecSDave Kleikamp sbi->s_gdb_count = db_count; 2358ac27a0ecSDave Kleikamp get_random_bytes(&sbi->s_next_generation, sizeof(u32)); 2359ac27a0ecSDave Kleikamp spin_lock_init(&sbi->s_next_gen_lock); 2360ac27a0ecSDave Kleikamp 2361833f4077SPeter Zijlstra err = percpu_counter_init(&sbi->s_freeblocks_counter, 2362617ba13bSMingming Cao ext4_count_free_blocks(sb)); 2363833f4077SPeter Zijlstra if (!err) { 2364833f4077SPeter Zijlstra err = percpu_counter_init(&sbi->s_freeinodes_counter, 2365617ba13bSMingming Cao ext4_count_free_inodes(sb)); 2366833f4077SPeter Zijlstra } 2367833f4077SPeter Zijlstra if (!err) { 2368833f4077SPeter Zijlstra err = percpu_counter_init(&sbi->s_dirs_counter, 2369617ba13bSMingming Cao ext4_count_dirs(sb)); 2370833f4077SPeter Zijlstra } 23716bc6e63fSAneesh Kumar K.V if (!err) { 23726bc6e63fSAneesh Kumar K.V err = percpu_counter_init(&sbi->s_dirtyblocks_counter, 0); 23736bc6e63fSAneesh Kumar K.V } 2374833f4077SPeter Zijlstra if (err) { 2375833f4077SPeter Zijlstra printk(KERN_ERR "EXT4-fs: insufficient memory\n"); 2376833f4077SPeter Zijlstra goto failed_mount3; 2377833f4077SPeter Zijlstra } 2378ac27a0ecSDave Kleikamp 2379c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 2380c9de560dSAlex Tomas 2381ac27a0ecSDave Kleikamp /* 2382ac27a0ecSDave Kleikamp * set up enough so that it can read an inode 2383ac27a0ecSDave Kleikamp */ 2384617ba13bSMingming Cao sb->s_op = &ext4_sops; 2385617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 2386617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 2387ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2388617ba13bSMingming Cao sb->s_qcop = &ext4_qctl_operations; 2389617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 2390ac27a0ecSDave Kleikamp #endif 2391ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 2392ac27a0ecSDave Kleikamp 2393ac27a0ecSDave Kleikamp sb->s_root = NULL; 2394ac27a0ecSDave Kleikamp 2395ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 2396617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, 2397617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_RECOVER)); 2398ac27a0ecSDave Kleikamp 2399ac27a0ecSDave Kleikamp /* 2400ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 2401ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 2402ac27a0ecSDave Kleikamp */ 2403ac27a0ecSDave Kleikamp if (!test_opt(sb, NOLOAD) && 2404617ba13bSMingming Cao EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 2405617ba13bSMingming Cao if (ext4_load_journal(sb, es, journal_devnum)) 2406ac27a0ecSDave Kleikamp goto failed_mount3; 2407624080edSTheodore Ts'o if (!(sb->s_flags & MS_RDONLY) && 2408624080edSTheodore Ts'o EXT4_SB(sb)->s_journal->j_failed_commit) { 2409624080edSTheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s): " 2410624080edSTheodore Ts'o "ext4_fill_super: Journal transaction " 2411624080edSTheodore Ts'o "%u is corrupt\n", sb->s_id, 2412624080edSTheodore Ts'o EXT4_SB(sb)->s_journal->j_failed_commit); 2413624080edSTheodore Ts'o if (test_opt(sb, ERRORS_RO)) { 2414624080edSTheodore Ts'o printk(KERN_CRIT 2415624080edSTheodore Ts'o "Mounting filesystem read-only\n"); 2416624080edSTheodore Ts'o sb->s_flags |= MS_RDONLY; 2417624080edSTheodore Ts'o EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 2418624080edSTheodore Ts'o es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 2419624080edSTheodore Ts'o } 2420624080edSTheodore Ts'o if (test_opt(sb, ERRORS_PANIC)) { 2421624080edSTheodore Ts'o EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 2422624080edSTheodore Ts'o es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 2423624080edSTheodore Ts'o ext4_commit_super(sb, es, 1); 2424624080edSTheodore Ts'o goto failed_mount4; 2425624080edSTheodore Ts'o } 2426624080edSTheodore Ts'o } 24270390131bSFrank Mayhar } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && 24280390131bSFrank Mayhar EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 24290390131bSFrank Mayhar printk(KERN_ERR "EXT4-fs: required journal recovery " 24300390131bSFrank Mayhar "suppressed and not mounted read-only\n"); 24310390131bSFrank Mayhar goto failed_mount4; 2432ac27a0ecSDave Kleikamp } else { 24330390131bSFrank Mayhar clear_opt(sbi->s_mount_opt, DATA_FLAGS); 24340390131bSFrank Mayhar set_opt(sbi->s_mount_opt, WRITEBACK_DATA); 24350390131bSFrank Mayhar sbi->s_journal = NULL; 24360390131bSFrank Mayhar needs_recovery = 0; 24370390131bSFrank Mayhar goto no_journal; 2438ac27a0ecSDave Kleikamp } 2439ac27a0ecSDave Kleikamp 2440eb40a09cSJose R. Santos if (ext4_blocks_count(es) > 0xffffffffULL && 2441eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 2442eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 2443abda1418STheodore Ts'o printk(KERN_ERR "EXT4-fs: Failed to set 64-bit journal feature\n"); 2444eb40a09cSJose R. Santos goto failed_mount4; 2445eb40a09cSJose R. Santos } 2446eb40a09cSJose R. Santos 2447818d276cSGirish Shilamkar if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 2448818d276cSGirish Shilamkar jbd2_journal_set_features(sbi->s_journal, 2449818d276cSGirish Shilamkar JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2450818d276cSGirish Shilamkar JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2451818d276cSGirish Shilamkar } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 2452818d276cSGirish Shilamkar jbd2_journal_set_features(sbi->s_journal, 2453818d276cSGirish Shilamkar JBD2_FEATURE_COMPAT_CHECKSUM, 0, 0); 2454818d276cSGirish Shilamkar jbd2_journal_clear_features(sbi->s_journal, 0, 0, 2455818d276cSGirish Shilamkar JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2456818d276cSGirish Shilamkar } else { 2457818d276cSGirish Shilamkar jbd2_journal_clear_features(sbi->s_journal, 2458818d276cSGirish Shilamkar JBD2_FEATURE_COMPAT_CHECKSUM, 0, 2459818d276cSGirish Shilamkar JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 2460818d276cSGirish Shilamkar } 2461818d276cSGirish Shilamkar 2462ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 2463ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 2464ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 2465ac27a0ecSDave Kleikamp case 0: 2466ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 246763f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 246863f57933SAndrew Morton * cope, else JOURNAL_DATA 246963f57933SAndrew Morton */ 2470dab291afSMingming Cao if (jbd2_journal_check_available_features 2471dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) 2472ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, ORDERED_DATA); 2473ac27a0ecSDave Kleikamp else 2474ac27a0ecSDave Kleikamp set_opt(sbi->s_mount_opt, JOURNAL_DATA); 2475ac27a0ecSDave Kleikamp break; 2476ac27a0ecSDave Kleikamp 2477617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 2478617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 2479dab291afSMingming Cao if (!jbd2_journal_check_available_features 2480dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 2481617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: Journal does not support " 2482ac27a0ecSDave Kleikamp "requested data journaling mode\n"); 2483ac27a0ecSDave Kleikamp goto failed_mount4; 2484ac27a0ecSDave Kleikamp } 2485ac27a0ecSDave Kleikamp default: 2486ac27a0ecSDave Kleikamp break; 2487ac27a0ecSDave Kleikamp } 2488b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 2489ac27a0ecSDave Kleikamp 24900390131bSFrank Mayhar no_journal: 2491ac27a0ecSDave Kleikamp 2492ac27a0ecSDave Kleikamp if (test_opt(sb, NOBH)) { 2493617ba13bSMingming Cao if (!(test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA)) { 2494617ba13bSMingming Cao printk(KERN_WARNING "EXT4-fs: Ignoring nobh option - " 2495ac27a0ecSDave Kleikamp "its supported only with writeback mode\n"); 2496ac27a0ecSDave Kleikamp clear_opt(sbi->s_mount_opt, NOBH); 2497ac27a0ecSDave Kleikamp } 2498ac27a0ecSDave Kleikamp } 2499ac27a0ecSDave Kleikamp /* 2500dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 2501ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 2502ac27a0ecSDave Kleikamp */ 2503ac27a0ecSDave Kleikamp 25041d1fe1eeSDavid Howells root = ext4_iget(sb, EXT4_ROOT_INO); 25051d1fe1eeSDavid Howells if (IS_ERR(root)) { 2506617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: get root inode failed\n"); 25071d1fe1eeSDavid Howells ret = PTR_ERR(root); 2508ac27a0ecSDave Kleikamp goto failed_mount4; 2509ac27a0ecSDave Kleikamp } 2510ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 25111d1fe1eeSDavid Howells iput(root); 2512617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: corrupt root inode, run e2fsck\n"); 2513ac27a0ecSDave Kleikamp goto failed_mount4; 2514ac27a0ecSDave Kleikamp } 25151d1fe1eeSDavid Howells sb->s_root = d_alloc_root(root); 25161d1fe1eeSDavid Howells if (!sb->s_root) { 25171d1fe1eeSDavid Howells printk(KERN_ERR "EXT4-fs: get root dentry failed\n"); 25181d1fe1eeSDavid Howells iput(root); 25191d1fe1eeSDavid Howells ret = -ENOMEM; 25201d1fe1eeSDavid Howells goto failed_mount4; 25211d1fe1eeSDavid Howells } 2522ac27a0ecSDave Kleikamp 2523617ba13bSMingming Cao ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY); 2524ef7f3835SKalpak Shah 2525ef7f3835SKalpak Shah /* determine the minimum size of new large inodes, if present */ 2526ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 2527ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 2528ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 2529ef7f3835SKalpak Shah if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 2530ef7f3835SKalpak Shah EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { 2531ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 2532ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize)) 2533ef7f3835SKalpak Shah sbi->s_want_extra_isize = 2534ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize); 2535ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 2536ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize)) 2537ef7f3835SKalpak Shah sbi->s_want_extra_isize = 2538ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize); 2539ef7f3835SKalpak Shah } 2540ef7f3835SKalpak Shah } 2541ef7f3835SKalpak Shah /* Check if enough inode space is available */ 2542ef7f3835SKalpak Shah if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > 2543ef7f3835SKalpak Shah sbi->s_inode_size) { 2544ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 2545ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 2546ef7f3835SKalpak Shah printk(KERN_INFO "EXT4-fs: required extra inode space not" 2547ef7f3835SKalpak Shah "available.\n"); 2548ef7f3835SKalpak Shah } 2549ef7f3835SKalpak Shah 2550c2774d84SAneesh Kumar K.V if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 2551c2774d84SAneesh Kumar K.V printk(KERN_WARNING "EXT4-fs: Ignoring delalloc option - " 2552c2774d84SAneesh Kumar K.V "requested data journaling mode\n"); 2553c2774d84SAneesh Kumar K.V clear_opt(sbi->s_mount_opt, DELALLOC); 2554c2774d84SAneesh Kumar K.V } else if (test_opt(sb, DELALLOC)) 2555c2774d84SAneesh Kumar K.V printk(KERN_INFO "EXT4-fs: delayed allocation enabled\n"); 2556c2774d84SAneesh Kumar K.V 2557c2774d84SAneesh Kumar K.V ext4_ext_init(sb); 2558c2774d84SAneesh Kumar K.V err = ext4_mb_init(sb, needs_recovery); 2559c2774d84SAneesh Kumar K.V if (err) { 2560c2774d84SAneesh Kumar K.V printk(KERN_ERR "EXT4-fs: failed to initalize mballoc (%d)\n", 2561c2774d84SAneesh Kumar K.V err); 2562c2774d84SAneesh Kumar K.V goto failed_mount4; 2563c2774d84SAneesh Kumar K.V } 2564c2774d84SAneesh Kumar K.V 2565ac27a0ecSDave Kleikamp /* 2566ac27a0ecSDave Kleikamp * akpm: core read_super() calls in here with the superblock locked. 2567ac27a0ecSDave Kleikamp * That deadlocks, because orphan cleanup needs to lock the superblock 2568ac27a0ecSDave Kleikamp * in numerous places. Here we just pop the lock - it's relatively 2569ac27a0ecSDave Kleikamp * harmless, because we are now ready to accept write_super() requests, 2570ac27a0ecSDave Kleikamp * and aviro says that's the only reason for hanging onto the 2571ac27a0ecSDave Kleikamp * superblock lock. 2572ac27a0ecSDave Kleikamp */ 2573617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 2574617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 2575617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 25760390131bSFrank Mayhar if (needs_recovery) { 2577617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: recovery complete.\n"); 2578617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 25790390131bSFrank Mayhar } 25800390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 25810390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 25820390131bSFrank Mayhar descr = " journalled data mode"; 25830390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 25840390131bSFrank Mayhar descr = " ordered data mode"; 25850390131bSFrank Mayhar else 25860390131bSFrank Mayhar descr = " writeback data mode"; 25870390131bSFrank Mayhar } else 25880390131bSFrank Mayhar descr = "out journal"; 25890390131bSFrank Mayhar 25900390131bSFrank Mayhar printk(KERN_INFO "EXT4-fs: mounted filesystem %s with%s\n", 25910390131bSFrank Mayhar sb->s_id, descr); 2592ac27a0ecSDave Kleikamp 2593ac27a0ecSDave Kleikamp lock_kernel(); 2594ac27a0ecSDave Kleikamp return 0; 2595ac27a0ecSDave Kleikamp 2596617ba13bSMingming Cao cantfind_ext4: 2597ac27a0ecSDave Kleikamp if (!silent) 2598617ba13bSMingming Cao printk(KERN_ERR "VFS: Can't find ext4 filesystem on dev %s.\n", 2599ac27a0ecSDave Kleikamp sb->s_id); 2600ac27a0ecSDave Kleikamp goto failed_mount; 2601ac27a0ecSDave Kleikamp 2602ac27a0ecSDave Kleikamp failed_mount4: 26030390131bSFrank Mayhar printk(KERN_ERR "EXT4-fs (device %s): mount failed\n", sb->s_id); 26040390131bSFrank Mayhar if (sbi->s_journal) { 2605dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 260647b4a50bSJan Kara sbi->s_journal = NULL; 26070390131bSFrank Mayhar } 2608ac27a0ecSDave Kleikamp failed_mount3: 2609ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeblocks_counter); 2610ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 2611ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 26126bc6e63fSAneesh Kumar K.V percpu_counter_destroy(&sbi->s_dirtyblocks_counter); 2613ac27a0ecSDave Kleikamp failed_mount2: 2614ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 2615ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 2616ac27a0ecSDave Kleikamp kfree(sbi->s_group_desc); 2617ac27a0ecSDave Kleikamp failed_mount: 2618240799cdSTheodore Ts'o if (sbi->s_proc) { 2619240799cdSTheodore Ts'o remove_proc_entry("inode_readahead_blks", sbi->s_proc); 26209f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 2621240799cdSTheodore Ts'o } 2622ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2623ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 2624ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 2625ac27a0ecSDave Kleikamp #endif 2626617ba13bSMingming Cao ext4_blkdev_remove(sbi); 2627ac27a0ecSDave Kleikamp brelse(bh); 2628ac27a0ecSDave Kleikamp out_fail: 2629ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 2630ac27a0ecSDave Kleikamp kfree(sbi); 2631ac27a0ecSDave Kleikamp lock_kernel(); 26321d1fe1eeSDavid Howells return ret; 2633ac27a0ecSDave Kleikamp } 2634ac27a0ecSDave Kleikamp 2635ac27a0ecSDave Kleikamp /* 2636ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 2637ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 2638ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 2639ac27a0ecSDave Kleikamp */ 2640617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 2641ac27a0ecSDave Kleikamp { 2642617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2643ac27a0ecSDave Kleikamp 2644ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 264530773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 264630773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 2647ac27a0ecSDave Kleikamp 2648ac27a0ecSDave Kleikamp spin_lock(&journal->j_state_lock); 2649ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 2650dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 2651ac27a0ecSDave Kleikamp else 2652dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 26535bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 26545bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 26555bf5683aSHidehiro Kawai else 26565bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 2657ac27a0ecSDave Kleikamp spin_unlock(&journal->j_state_lock); 2658ac27a0ecSDave Kleikamp } 2659ac27a0ecSDave Kleikamp 2660617ba13bSMingming Cao static journal_t *ext4_get_journal(struct super_block *sb, 2661ac27a0ecSDave Kleikamp unsigned int journal_inum) 2662ac27a0ecSDave Kleikamp { 2663ac27a0ecSDave Kleikamp struct inode *journal_inode; 2664ac27a0ecSDave Kleikamp journal_t *journal; 2665ac27a0ecSDave Kleikamp 26660390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 26670390131bSFrank Mayhar 2668ac27a0ecSDave Kleikamp /* First, test for the existence of a valid inode on disk. Bad 2669ac27a0ecSDave Kleikamp * things happen if we iget() an unused inode, as the subsequent 2670ac27a0ecSDave Kleikamp * iput() will try to delete it. */ 2671ac27a0ecSDave Kleikamp 26721d1fe1eeSDavid Howells journal_inode = ext4_iget(sb, journal_inum); 26731d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 2674617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: no journal found.\n"); 2675ac27a0ecSDave Kleikamp return NULL; 2676ac27a0ecSDave Kleikamp } 2677ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 2678ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 2679ac27a0ecSDave Kleikamp iput(journal_inode); 2680617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: journal inode is deleted.\n"); 2681ac27a0ecSDave Kleikamp return NULL; 2682ac27a0ecSDave Kleikamp } 2683ac27a0ecSDave Kleikamp 2684e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 2685ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 26861d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 2687617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: invalid journal inode.\n"); 2688ac27a0ecSDave Kleikamp iput(journal_inode); 2689ac27a0ecSDave Kleikamp return NULL; 2690ac27a0ecSDave Kleikamp } 2691ac27a0ecSDave Kleikamp 2692dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 2693ac27a0ecSDave Kleikamp if (!journal) { 2694617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: Could not load journal inode\n"); 2695ac27a0ecSDave Kleikamp iput(journal_inode); 2696ac27a0ecSDave Kleikamp return NULL; 2697ac27a0ecSDave Kleikamp } 2698ac27a0ecSDave Kleikamp journal->j_private = sb; 2699617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 2700ac27a0ecSDave Kleikamp return journal; 2701ac27a0ecSDave Kleikamp } 2702ac27a0ecSDave Kleikamp 2703617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 2704ac27a0ecSDave Kleikamp dev_t j_dev) 2705ac27a0ecSDave Kleikamp { 2706ac27a0ecSDave Kleikamp struct buffer_head *bh; 2707ac27a0ecSDave Kleikamp journal_t *journal; 2708617ba13bSMingming Cao ext4_fsblk_t start; 2709617ba13bSMingming Cao ext4_fsblk_t len; 2710ac27a0ecSDave Kleikamp int hblock, blocksize; 2711617ba13bSMingming Cao ext4_fsblk_t sb_block; 2712ac27a0ecSDave Kleikamp unsigned long offset; 2713617ba13bSMingming Cao struct ext4_super_block *es; 2714ac27a0ecSDave Kleikamp struct block_device *bdev; 2715ac27a0ecSDave Kleikamp 27160390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 27170390131bSFrank Mayhar 2718617ba13bSMingming Cao bdev = ext4_blkdev_get(j_dev); 2719ac27a0ecSDave Kleikamp if (bdev == NULL) 2720ac27a0ecSDave Kleikamp return NULL; 2721ac27a0ecSDave Kleikamp 2722ac27a0ecSDave Kleikamp if (bd_claim(bdev, sb)) { 2723ac27a0ecSDave Kleikamp printk(KERN_ERR 2724abda1418STheodore Ts'o "EXT4-fs: failed to claim external journal device.\n"); 27259a1c3542SAl Viro blkdev_put(bdev, FMODE_READ|FMODE_WRITE); 2726ac27a0ecSDave Kleikamp return NULL; 2727ac27a0ecSDave Kleikamp } 2728ac27a0ecSDave Kleikamp 2729ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 2730ac27a0ecSDave Kleikamp hblock = bdev_hardsect_size(bdev); 2731ac27a0ecSDave Kleikamp if (blocksize < hblock) { 2732ac27a0ecSDave Kleikamp printk(KERN_ERR 2733617ba13bSMingming Cao "EXT4-fs: blocksize too small for journal device.\n"); 2734ac27a0ecSDave Kleikamp goto out_bdev; 2735ac27a0ecSDave Kleikamp } 2736ac27a0ecSDave Kleikamp 2737617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 2738617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 2739ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 2740ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 2741617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: couldn't read superblock of " 2742ac27a0ecSDave Kleikamp "external journal\n"); 2743ac27a0ecSDave Kleikamp goto out_bdev; 2744ac27a0ecSDave Kleikamp } 2745ac27a0ecSDave Kleikamp 2746617ba13bSMingming Cao es = (struct ext4_super_block *) (((char *)bh->b_data) + offset); 2747617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 2748ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 2749617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 2750617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: external journal has " 2751ac27a0ecSDave Kleikamp "bad superblock\n"); 2752ac27a0ecSDave Kleikamp brelse(bh); 2753ac27a0ecSDave Kleikamp goto out_bdev; 2754ac27a0ecSDave Kleikamp } 2755ac27a0ecSDave Kleikamp 2756617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 2757617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: journal UUID does not match\n"); 2758ac27a0ecSDave Kleikamp brelse(bh); 2759ac27a0ecSDave Kleikamp goto out_bdev; 2760ac27a0ecSDave Kleikamp } 2761ac27a0ecSDave Kleikamp 2762bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 2763ac27a0ecSDave Kleikamp start = sb_block + 1; 2764ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 2765ac27a0ecSDave Kleikamp 2766dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 2767ac27a0ecSDave Kleikamp start, len, blocksize); 2768ac27a0ecSDave Kleikamp if (!journal) { 2769617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: failed to create device journal\n"); 2770ac27a0ecSDave Kleikamp goto out_bdev; 2771ac27a0ecSDave Kleikamp } 2772ac27a0ecSDave Kleikamp journal->j_private = sb; 2773ac27a0ecSDave Kleikamp ll_rw_block(READ, 1, &journal->j_sb_buffer); 2774ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 2775ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 2776617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: I/O error on journal device\n"); 2777ac27a0ecSDave Kleikamp goto out_journal; 2778ac27a0ecSDave Kleikamp } 2779ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 2780617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: External journal has more than one " 2781ac27a0ecSDave Kleikamp "user (unsupported) - %d\n", 2782ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 2783ac27a0ecSDave Kleikamp goto out_journal; 2784ac27a0ecSDave Kleikamp } 2785617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 2786617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 2787ac27a0ecSDave Kleikamp return journal; 2788ac27a0ecSDave Kleikamp out_journal: 2789dab291afSMingming Cao jbd2_journal_destroy(journal); 2790ac27a0ecSDave Kleikamp out_bdev: 2791617ba13bSMingming Cao ext4_blkdev_put(bdev); 2792ac27a0ecSDave Kleikamp return NULL; 2793ac27a0ecSDave Kleikamp } 2794ac27a0ecSDave Kleikamp 2795617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 2796617ba13bSMingming Cao struct ext4_super_block *es, 2797ac27a0ecSDave Kleikamp unsigned long journal_devnum) 2798ac27a0ecSDave Kleikamp { 2799ac27a0ecSDave Kleikamp journal_t *journal; 2800ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 2801ac27a0ecSDave Kleikamp dev_t journal_dev; 2802ac27a0ecSDave Kleikamp int err = 0; 2803ac27a0ecSDave Kleikamp int really_read_only; 2804ac27a0ecSDave Kleikamp 28050390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 28060390131bSFrank Mayhar 2807ac27a0ecSDave Kleikamp if (journal_devnum && 2808ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 2809617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: external journal device major/minor " 2810ac27a0ecSDave Kleikamp "numbers have changed\n"); 2811ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 2812ac27a0ecSDave Kleikamp } else 2813ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 2814ac27a0ecSDave Kleikamp 2815ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 2816ac27a0ecSDave Kleikamp 2817ac27a0ecSDave Kleikamp /* 2818ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 2819ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 2820ac27a0ecSDave Kleikamp * can get read-write access to the device. 2821ac27a0ecSDave Kleikamp */ 2822ac27a0ecSDave Kleikamp 2823617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 2824ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 2825617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: INFO: recovery " 2826ac27a0ecSDave Kleikamp "required on readonly filesystem.\n"); 2827ac27a0ecSDave Kleikamp if (really_read_only) { 2828617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: write access " 2829ac27a0ecSDave Kleikamp "unavailable, cannot proceed.\n"); 2830ac27a0ecSDave Kleikamp return -EROFS; 2831ac27a0ecSDave Kleikamp } 2832617ba13bSMingming Cao printk(KERN_INFO "EXT4-fs: write access will " 2833ac27a0ecSDave Kleikamp "be enabled during recovery.\n"); 2834ac27a0ecSDave Kleikamp } 2835ac27a0ecSDave Kleikamp } 2836ac27a0ecSDave Kleikamp 2837ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 2838617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: filesystem has both journal " 2839ac27a0ecSDave Kleikamp "and inode journals!\n"); 2840ac27a0ecSDave Kleikamp return -EINVAL; 2841ac27a0ecSDave Kleikamp } 2842ac27a0ecSDave Kleikamp 2843ac27a0ecSDave Kleikamp if (journal_inum) { 2844617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 2845ac27a0ecSDave Kleikamp return -EINVAL; 2846ac27a0ecSDave Kleikamp } else { 2847617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 2848ac27a0ecSDave Kleikamp return -EINVAL; 2849ac27a0ecSDave Kleikamp } 2850ac27a0ecSDave Kleikamp 28514776004fSTheodore Ts'o if (journal->j_flags & JBD2_BARRIER) 28524776004fSTheodore Ts'o printk(KERN_INFO "EXT4-fs: barriers enabled\n"); 28534776004fSTheodore Ts'o else 28544776004fSTheodore Ts'o printk(KERN_INFO "EXT4-fs: barriers disabled\n"); 28554776004fSTheodore Ts'o 2856ac27a0ecSDave Kleikamp if (!really_read_only && test_opt(sb, UPDATE_JOURNAL)) { 2857dab291afSMingming Cao err = jbd2_journal_update_format(journal); 2858ac27a0ecSDave Kleikamp if (err) { 2859617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: error updating journal.\n"); 2860dab291afSMingming Cao jbd2_journal_destroy(journal); 2861ac27a0ecSDave Kleikamp return err; 2862ac27a0ecSDave Kleikamp } 2863ac27a0ecSDave Kleikamp } 2864ac27a0ecSDave Kleikamp 2865617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) 2866dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 2867ac27a0ecSDave Kleikamp if (!err) 2868dab291afSMingming Cao err = jbd2_journal_load(journal); 2869ac27a0ecSDave Kleikamp 2870ac27a0ecSDave Kleikamp if (err) { 2871617ba13bSMingming Cao printk(KERN_ERR "EXT4-fs: error loading journal.\n"); 2872dab291afSMingming Cao jbd2_journal_destroy(journal); 2873ac27a0ecSDave Kleikamp return err; 2874ac27a0ecSDave Kleikamp } 2875ac27a0ecSDave Kleikamp 2876617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 2877617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 2878ac27a0ecSDave Kleikamp 2879ac27a0ecSDave Kleikamp if (journal_devnum && 2880ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 2881ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 2882ac27a0ecSDave Kleikamp sb->s_dirt = 1; 2883ac27a0ecSDave Kleikamp 2884ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 2885617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 2886ac27a0ecSDave Kleikamp } 2887ac27a0ecSDave Kleikamp 2888ac27a0ecSDave Kleikamp return 0; 2889ac27a0ecSDave Kleikamp } 2890ac27a0ecSDave Kleikamp 2891*c4be0c1dSTakashi Sato static int ext4_commit_super(struct super_block *sb, 28922b2d6d01STheodore Ts'o struct ext4_super_block *es, int sync) 2893ac27a0ecSDave Kleikamp { 2894617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 2895*c4be0c1dSTakashi Sato int error = 0; 2896ac27a0ecSDave Kleikamp 2897ac27a0ecSDave Kleikamp if (!sbh) 2898*c4be0c1dSTakashi Sato return error; 2899914258bfSTheodore Ts'o if (buffer_write_io_error(sbh)) { 2900914258bfSTheodore Ts'o /* 2901914258bfSTheodore Ts'o * Oh, dear. A previous attempt to write the 2902914258bfSTheodore Ts'o * superblock failed. This could happen because the 2903914258bfSTheodore Ts'o * USB device was yanked out. Or it could happen to 2904914258bfSTheodore Ts'o * be a transient write error and maybe the block will 2905914258bfSTheodore Ts'o * be remapped. Nothing we can do but to retry the 2906914258bfSTheodore Ts'o * write and hope for the best. 2907914258bfSTheodore Ts'o */ 2908abda1418STheodore Ts'o printk(KERN_ERR "EXT4-fs: previous I/O error to " 2909914258bfSTheodore Ts'o "superblock detected for %s.\n", sb->s_id); 2910914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 2911914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 2912914258bfSTheodore Ts'o } 2913ac27a0ecSDave Kleikamp es->s_wtime = cpu_to_le32(get_seconds()); 29145d1b1b3fSAneesh Kumar K.V ext4_free_blocks_count_set(es, percpu_counter_sum_positive( 29155d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeblocks_counter)); 29165d1b1b3fSAneesh Kumar K.V es->s_free_inodes_count = cpu_to_le32(percpu_counter_sum_positive( 29175d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeinodes_counter)); 29185d1b1b3fSAneesh Kumar K.V 2919ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 2920ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 2921914258bfSTheodore Ts'o if (sync) { 2922*c4be0c1dSTakashi Sato error = sync_dirty_buffer(sbh); 2923*c4be0c1dSTakashi Sato if (error) 2924*c4be0c1dSTakashi Sato return error; 2925*c4be0c1dSTakashi Sato 2926*c4be0c1dSTakashi Sato error = buffer_write_io_error(sbh); 2927*c4be0c1dSTakashi Sato if (error) { 2928abda1418STheodore Ts'o printk(KERN_ERR "EXT4-fs: I/O error while writing " 2929914258bfSTheodore Ts'o "superblock for %s.\n", sb->s_id); 2930914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 2931914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 2932914258bfSTheodore Ts'o } 2933914258bfSTheodore Ts'o } 2934*c4be0c1dSTakashi Sato return error; 2935ac27a0ecSDave Kleikamp } 2936ac27a0ecSDave Kleikamp 2937ac27a0ecSDave Kleikamp 2938ac27a0ecSDave Kleikamp /* 2939ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 2940ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 2941ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 2942ac27a0ecSDave Kleikamp */ 2943617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 2944617ba13bSMingming Cao struct ext4_super_block *es) 2945ac27a0ecSDave Kleikamp { 2946617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 2947ac27a0ecSDave Kleikamp 29480390131bSFrank Mayhar if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 29490390131bSFrank Mayhar BUG_ON(journal != NULL); 29500390131bSFrank Mayhar return; 29510390131bSFrank Mayhar } 2952dab291afSMingming Cao jbd2_journal_lock_updates(journal); 29537ffe1ea8SHidehiro Kawai if (jbd2_journal_flush(journal) < 0) 29547ffe1ea8SHidehiro Kawai goto out; 29557ffe1ea8SHidehiro Kawai 295632c37730SJan Kara lock_super(sb); 2957617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && 2958ac27a0ecSDave Kleikamp sb->s_flags & MS_RDONLY) { 2959617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 2960ac27a0ecSDave Kleikamp sb->s_dirt = 0; 2961617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 2962ac27a0ecSDave Kleikamp } 296332c37730SJan Kara unlock_super(sb); 29647ffe1ea8SHidehiro Kawai 29657ffe1ea8SHidehiro Kawai out: 2966dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 2967ac27a0ecSDave Kleikamp } 2968ac27a0ecSDave Kleikamp 2969ac27a0ecSDave Kleikamp /* 2970ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 2971ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 2972ac27a0ecSDave Kleikamp * main filesystem now. 2973ac27a0ecSDave Kleikamp */ 2974617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 2975617ba13bSMingming Cao struct ext4_super_block *es) 2976ac27a0ecSDave Kleikamp { 2977ac27a0ecSDave Kleikamp journal_t *journal; 2978ac27a0ecSDave Kleikamp int j_errno; 2979ac27a0ecSDave Kleikamp const char *errstr; 2980ac27a0ecSDave Kleikamp 29810390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 29820390131bSFrank Mayhar 2983617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 2984ac27a0ecSDave Kleikamp 2985ac27a0ecSDave Kleikamp /* 2986ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 2987617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 2988ac27a0ecSDave Kleikamp */ 2989ac27a0ecSDave Kleikamp 2990dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 2991ac27a0ecSDave Kleikamp if (j_errno) { 2992ac27a0ecSDave Kleikamp char nbuf[16]; 2993ac27a0ecSDave Kleikamp 2994617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 299546e665e9SHarvey Harrison ext4_warning(sb, __func__, "Filesystem error recorded " 2996ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 299746e665e9SHarvey Harrison ext4_warning(sb, __func__, "Marking fs in need of " 2998ac27a0ecSDave Kleikamp "filesystem check."); 2999ac27a0ecSDave Kleikamp 3000617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 3001617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 3002617ba13bSMingming Cao ext4_commit_super(sb, es, 1); 3003ac27a0ecSDave Kleikamp 3004dab291afSMingming Cao jbd2_journal_clear_err(journal); 3005ac27a0ecSDave Kleikamp } 3006ac27a0ecSDave Kleikamp } 3007ac27a0ecSDave Kleikamp 3008ac27a0ecSDave Kleikamp /* 3009ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 3010ac27a0ecSDave Kleikamp * and wait on the commit. 3011ac27a0ecSDave Kleikamp */ 3012617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 3013ac27a0ecSDave Kleikamp { 3014ac27a0ecSDave Kleikamp journal_t *journal; 30150390131bSFrank Mayhar int ret = 0; 3016ac27a0ecSDave Kleikamp 3017ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 3018ac27a0ecSDave Kleikamp return 0; 3019ac27a0ecSDave Kleikamp 3020617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 30210390131bSFrank Mayhar if (journal) { 3022ac27a0ecSDave Kleikamp sb->s_dirt = 0; 3023617ba13bSMingming Cao ret = ext4_journal_force_commit(journal); 30240390131bSFrank Mayhar } 30250390131bSFrank Mayhar 3026ac27a0ecSDave Kleikamp return ret; 3027ac27a0ecSDave Kleikamp } 3028ac27a0ecSDave Kleikamp 3029ac27a0ecSDave Kleikamp /* 3030617ba13bSMingming Cao * Ext4 always journals updates to the superblock itself, so we don't 3031ac27a0ecSDave Kleikamp * have to propagate any other updates to the superblock on disk at this 303214ce0cb4STheodore Ts'o * point. (We can probably nuke this function altogether, and remove 303314ce0cb4STheodore Ts'o * any mention to sb->s_dirt in all of fs/ext4; eventual cleanup...) 3034ac27a0ecSDave Kleikamp */ 3035617ba13bSMingming Cao static void ext4_write_super(struct super_block *sb) 3036ac27a0ecSDave Kleikamp { 30370390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 3038ac27a0ecSDave Kleikamp if (mutex_trylock(&sb->s_lock) != 0) 3039ac27a0ecSDave Kleikamp BUG(); 3040ac27a0ecSDave Kleikamp sb->s_dirt = 0; 30410390131bSFrank Mayhar } else { 30420390131bSFrank Mayhar ext4_commit_super(sb, EXT4_SB(sb)->s_es, 1); 30430390131bSFrank Mayhar } 3044ac27a0ecSDave Kleikamp } 3045ac27a0ecSDave Kleikamp 3046617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 3047ac27a0ecSDave Kleikamp { 304814ce0cb4STheodore Ts'o int ret = 0; 3049ac27a0ecSDave Kleikamp 3050ede86cc4STheodore Ts'o trace_mark(ext4_sync_fs, "dev %s wait %d", sb->s_id, wait); 3051ac27a0ecSDave Kleikamp sb->s_dirt = 0; 30520390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 3053ac27a0ecSDave Kleikamp if (wait) 305414ce0cb4STheodore Ts'o ret = ext4_force_commit(sb); 305514ce0cb4STheodore Ts'o else 305614ce0cb4STheodore Ts'o jbd2_journal_start_commit(EXT4_SB(sb)->s_journal, NULL); 30570390131bSFrank Mayhar } else { 30580390131bSFrank Mayhar ext4_commit_super(sb, EXT4_SB(sb)->s_es, wait); 30590390131bSFrank Mayhar } 306014ce0cb4STheodore Ts'o return ret; 3061ac27a0ecSDave Kleikamp } 3062ac27a0ecSDave Kleikamp 3063ac27a0ecSDave Kleikamp /* 3064ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 3065ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 3066ac27a0ecSDave Kleikamp */ 3067*c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 3068ac27a0ecSDave Kleikamp { 3069*c4be0c1dSTakashi Sato int error = 0; 3070*c4be0c1dSTakashi Sato journal_t *journal; 3071ac27a0ecSDave Kleikamp sb->s_dirt = 0; 3072ac27a0ecSDave Kleikamp 3073ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 3074*c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 3075ac27a0ecSDave Kleikamp 30760390131bSFrank Mayhar if (journal) { 3077ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 3078dab291afSMingming Cao jbd2_journal_lock_updates(journal); 30797ffe1ea8SHidehiro Kawai 30807ffe1ea8SHidehiro Kawai /* 30810390131bSFrank Mayhar * We don't want to clear needs_recovery flag when we 30820390131bSFrank Mayhar * failed to flush the journal. 30837ffe1ea8SHidehiro Kawai */ 3084*c4be0c1dSTakashi Sato error = jbd2_journal_flush(journal); 3085*c4be0c1dSTakashi Sato if (error < 0) 3086*c4be0c1dSTakashi Sato goto out; 30870390131bSFrank Mayhar } 3088ac27a0ecSDave Kleikamp 3089ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 3090617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 3091617ba13bSMingming Cao ext4_commit_super(sb, EXT4_SB(sb)->s_es, 1); 3092*c4be0c1dSTakashi Sato error = ext4_commit_super(sb, EXT4_SB(sb)->s_es, 1); 3093*c4be0c1dSTakashi Sato if (error) 3094*c4be0c1dSTakashi Sato goto out; 3095ac27a0ecSDave Kleikamp } 3096*c4be0c1dSTakashi Sato return 0; 3097*c4be0c1dSTakashi Sato out: 3098*c4be0c1dSTakashi Sato jbd2_journal_unlock_updates(journal); 3099*c4be0c1dSTakashi Sato return error; 3100ac27a0ecSDave Kleikamp } 3101ac27a0ecSDave Kleikamp 3102ac27a0ecSDave Kleikamp /* 3103ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 3104ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 3105ac27a0ecSDave Kleikamp */ 3106*c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 3107ac27a0ecSDave Kleikamp { 31080390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !(sb->s_flags & MS_RDONLY)) { 3109ac27a0ecSDave Kleikamp lock_super(sb); 3110ac27a0ecSDave Kleikamp /* Reser the needs_recovery flag before the fs is unlocked. */ 3111617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 3112617ba13bSMingming Cao ext4_commit_super(sb, EXT4_SB(sb)->s_es, 1); 3113ac27a0ecSDave Kleikamp unlock_super(sb); 3114dab291afSMingming Cao jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 3115ac27a0ecSDave Kleikamp } 3116*c4be0c1dSTakashi Sato return 0; 3117ac27a0ecSDave Kleikamp } 3118ac27a0ecSDave Kleikamp 3119617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 3120ac27a0ecSDave Kleikamp { 3121617ba13bSMingming Cao struct ext4_super_block *es; 3122617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3123617ba13bSMingming Cao ext4_fsblk_t n_blocks_count = 0; 3124ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 3125617ba13bSMingming Cao struct ext4_mount_options old_opts; 31268a266467STheodore Ts'o ext4_group_t g; 3127b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 3128ac27a0ecSDave Kleikamp int err; 3129ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3130ac27a0ecSDave Kleikamp int i; 3131ac27a0ecSDave Kleikamp #endif 3132ac27a0ecSDave Kleikamp 3133ac27a0ecSDave Kleikamp /* Store the original options */ 3134ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 3135ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 3136ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 3137ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 3138ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 313930773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 314030773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 3141ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3142ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 3143ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 3144ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] = sbi->s_qf_names[i]; 3145ac27a0ecSDave Kleikamp #endif 3146b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 3147b3881f74STheodore Ts'o journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; 3148ac27a0ecSDave Kleikamp 3149ac27a0ecSDave Kleikamp /* 3150ac27a0ecSDave Kleikamp * Allow the "check" option to be passed as a remount option. 3151ac27a0ecSDave Kleikamp */ 3152b3881f74STheodore Ts'o if (!parse_options(data, sb, NULL, &journal_ioprio, 3153b3881f74STheodore Ts'o &n_blocks_count, 1)) { 3154ac27a0ecSDave Kleikamp err = -EINVAL; 3155ac27a0ecSDave Kleikamp goto restore_opts; 3156ac27a0ecSDave Kleikamp } 3157ac27a0ecSDave Kleikamp 3158617ba13bSMingming Cao if (sbi->s_mount_opt & EXT4_MOUNT_ABORT) 315946e665e9SHarvey Harrison ext4_abort(sb, __func__, "Abort forced by user"); 3160ac27a0ecSDave Kleikamp 3161ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 3162617ba13bSMingming Cao ((sbi->s_mount_opt & EXT4_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); 3163ac27a0ecSDave Kleikamp 3164ac27a0ecSDave Kleikamp es = sbi->s_es; 3165ac27a0ecSDave Kleikamp 3166b3881f74STheodore Ts'o if (sbi->s_journal) { 3167617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 3168b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 3169b3881f74STheodore Ts'o } 3170ac27a0ecSDave Kleikamp 3171ac27a0ecSDave Kleikamp if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY) || 3172bd81d8eeSLaurent Vivier n_blocks_count > ext4_blocks_count(es)) { 3173617ba13bSMingming Cao if (sbi->s_mount_opt & EXT4_MOUNT_ABORT) { 3174ac27a0ecSDave Kleikamp err = -EROFS; 3175ac27a0ecSDave Kleikamp goto restore_opts; 3176ac27a0ecSDave Kleikamp } 3177ac27a0ecSDave Kleikamp 3178ac27a0ecSDave Kleikamp if (*flags & MS_RDONLY) { 3179ac27a0ecSDave Kleikamp /* 3180ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 3181ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 3182ac27a0ecSDave Kleikamp */ 3183ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 3184ac27a0ecSDave Kleikamp 3185ac27a0ecSDave Kleikamp /* 3186ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 3187ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 3188ac27a0ecSDave Kleikamp * mark the partition as valid again. 3189ac27a0ecSDave Kleikamp */ 3190617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 3191617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 3192ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 3193ac27a0ecSDave Kleikamp 319432c37730SJan Kara /* 319532c37730SJan Kara * We have to unlock super so that we can wait for 319632c37730SJan Kara * transactions. 319732c37730SJan Kara */ 31980390131bSFrank Mayhar if (sbi->s_journal) { 319932c37730SJan Kara unlock_super(sb); 3200617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 320132c37730SJan Kara lock_super(sb); 32020390131bSFrank Mayhar } 3203ac27a0ecSDave Kleikamp } else { 32043a06d778SAneesh Kumar K.V int ret; 3205617ba13bSMingming Cao if ((ret = EXT4_HAS_RO_COMPAT_FEATURE(sb, 3206617ba13bSMingming Cao ~EXT4_FEATURE_RO_COMPAT_SUPP))) { 3207617ba13bSMingming Cao printk(KERN_WARNING "EXT4-fs: %s: couldn't " 3208ac27a0ecSDave Kleikamp "remount RDWR because of unsupported " 32093a06d778SAneesh Kumar K.V "optional features (%x).\n", sb->s_id, 32103a06d778SAneesh Kumar K.V (le32_to_cpu(sbi->s_es->s_feature_ro_compat) & 32113a06d778SAneesh Kumar K.V ~EXT4_FEATURE_RO_COMPAT_SUPP)); 3212ac27a0ecSDave Kleikamp err = -EROFS; 3213ac27a0ecSDave Kleikamp goto restore_opts; 3214ac27a0ecSDave Kleikamp } 3215ead6596bSEric Sandeen 3216ead6596bSEric Sandeen /* 32178a266467STheodore Ts'o * Make sure the group descriptor checksums 32188a266467STheodore Ts'o * are sane. If they aren't, refuse to 32198a266467STheodore Ts'o * remount r/w. 32208a266467STheodore Ts'o */ 32218a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 32228a266467STheodore Ts'o struct ext4_group_desc *gdp = 32238a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 32248a266467STheodore Ts'o 32258a266467STheodore Ts'o if (!ext4_group_desc_csum_verify(sbi, g, gdp)) { 32268a266467STheodore Ts'o printk(KERN_ERR 32278a266467STheodore Ts'o "EXT4-fs: ext4_remount: " 3228a9df9a49STheodore Ts'o "Checksum for group %u failed (%u!=%u)\n", 32298a266467STheodore Ts'o g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), 32308a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 32318a266467STheodore Ts'o err = -EINVAL; 32328a266467STheodore Ts'o goto restore_opts; 32338a266467STheodore Ts'o } 32348a266467STheodore Ts'o } 32358a266467STheodore Ts'o 32368a266467STheodore Ts'o /* 3237ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 3238ead6596bSEric Sandeen * around from a previously readonly bdev mount, 3239ead6596bSEric Sandeen * require a full umount/remount for now. 3240ead6596bSEric Sandeen */ 3241ead6596bSEric Sandeen if (es->s_last_orphan) { 3242ead6596bSEric Sandeen printk(KERN_WARNING "EXT4-fs: %s: couldn't " 3243ead6596bSEric Sandeen "remount RDWR because of unprocessed " 3244ead6596bSEric Sandeen "orphan inode list. Please " 3245ead6596bSEric Sandeen "umount/remount instead.\n", 3246ead6596bSEric Sandeen sb->s_id); 3247ead6596bSEric Sandeen err = -EINVAL; 3248ead6596bSEric Sandeen goto restore_opts; 3249ead6596bSEric Sandeen } 3250ead6596bSEric Sandeen 3251ac27a0ecSDave Kleikamp /* 3252ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 3253ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 3254ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 3255ac27a0ecSDave Kleikamp * the partition.) 3256ac27a0ecSDave Kleikamp */ 32570390131bSFrank Mayhar if (sbi->s_journal) 3258617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 3259ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 3260617ba13bSMingming Cao if ((err = ext4_group_extend(sb, es, n_blocks_count))) 3261ac27a0ecSDave Kleikamp goto restore_opts; 3262617ba13bSMingming Cao if (!ext4_setup_super(sb, es, 0)) 3263ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 3264ac27a0ecSDave Kleikamp } 3265ac27a0ecSDave Kleikamp } 32660390131bSFrank Mayhar if (sbi->s_journal == NULL) 32670390131bSFrank Mayhar ext4_commit_super(sb, es, 1); 32680390131bSFrank Mayhar 3269ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3270ac27a0ecSDave Kleikamp /* Release old quota file names */ 3271ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 3272ac27a0ecSDave Kleikamp if (old_opts.s_qf_names[i] && 3273ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 3274ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 3275ac27a0ecSDave Kleikamp #endif 3276ac27a0ecSDave Kleikamp return 0; 3277ac27a0ecSDave Kleikamp restore_opts: 3278ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 3279ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 3280ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 3281ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 3282ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 328330773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 328430773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 3285ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3286ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 3287ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 3288ac27a0ecSDave Kleikamp if (sbi->s_qf_names[i] && 3289ac27a0ecSDave Kleikamp old_opts.s_qf_names[i] != sbi->s_qf_names[i]) 3290ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 3291ac27a0ecSDave Kleikamp sbi->s_qf_names[i] = old_opts.s_qf_names[i]; 3292ac27a0ecSDave Kleikamp } 3293ac27a0ecSDave Kleikamp #endif 3294ac27a0ecSDave Kleikamp return err; 3295ac27a0ecSDave Kleikamp } 3296ac27a0ecSDave Kleikamp 3297617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 3298ac27a0ecSDave Kleikamp { 3299ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 3300617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 3301617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 3302960cc398SPekka Enberg u64 fsid; 3303ac27a0ecSDave Kleikamp 33045e70030dSBadari Pulavarty if (test_opt(sb, MINIX_DF)) { 33055e70030dSBadari Pulavarty sbi->s_overhead_last = 0; 33066bc9feffSAneesh Kumar K.V } else if (sbi->s_blocks_last != ext4_blocks_count(es)) { 3307fd2d4291SAvantika Mathur ext4_group_t ngroups = sbi->s_groups_count, i; 33085e70030dSBadari Pulavarty ext4_fsblk_t overhead = 0; 3309ac27a0ecSDave Kleikamp smp_rmb(); 3310ac27a0ecSDave Kleikamp 3311ac27a0ecSDave Kleikamp /* 33125e70030dSBadari Pulavarty * Compute the overhead (FS structures). This is constant 33135e70030dSBadari Pulavarty * for a given filesystem unless the number of block groups 33145e70030dSBadari Pulavarty * changes so we cache the previous value until it does. 3315ac27a0ecSDave Kleikamp */ 3316ac27a0ecSDave Kleikamp 3317ac27a0ecSDave Kleikamp /* 3318ac27a0ecSDave Kleikamp * All of the blocks before first_data_block are 3319ac27a0ecSDave Kleikamp * overhead 3320ac27a0ecSDave Kleikamp */ 3321ac27a0ecSDave Kleikamp overhead = le32_to_cpu(es->s_first_data_block); 3322ac27a0ecSDave Kleikamp 3323ac27a0ecSDave Kleikamp /* 3324ac27a0ecSDave Kleikamp * Add the overhead attributed to the superblock and 3325ac27a0ecSDave Kleikamp * block group descriptors. If the sparse superblocks 3326ac27a0ecSDave Kleikamp * feature is turned on, then not all groups have this. 3327ac27a0ecSDave Kleikamp */ 3328ac27a0ecSDave Kleikamp for (i = 0; i < ngroups; i++) { 3329617ba13bSMingming Cao overhead += ext4_bg_has_super(sb, i) + 3330617ba13bSMingming Cao ext4_bg_num_gdb(sb, i); 3331ac27a0ecSDave Kleikamp cond_resched(); 3332ac27a0ecSDave Kleikamp } 3333ac27a0ecSDave Kleikamp 3334ac27a0ecSDave Kleikamp /* 3335ac27a0ecSDave Kleikamp * Every block group has an inode bitmap, a block 3336ac27a0ecSDave Kleikamp * bitmap, and an inode table. 3337ac27a0ecSDave Kleikamp */ 33385e70030dSBadari Pulavarty overhead += ngroups * (2 + sbi->s_itb_per_group); 33395e70030dSBadari Pulavarty sbi->s_overhead_last = overhead; 33405e70030dSBadari Pulavarty smp_wmb(); 33416bc9feffSAneesh Kumar K.V sbi->s_blocks_last = ext4_blocks_count(es); 3342ac27a0ecSDave Kleikamp } 3343ac27a0ecSDave Kleikamp 3344617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 3345ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 33465e70030dSBadari Pulavarty buf->f_blocks = ext4_blocks_count(es) - sbi->s_overhead_last; 33476bc6e63fSAneesh Kumar K.V buf->f_bfree = percpu_counter_sum_positive(&sbi->s_freeblocks_counter) - 33486bc6e63fSAneesh Kumar K.V percpu_counter_sum_positive(&sbi->s_dirtyblocks_counter); 3349308ba3ecSAneesh Kumar K.V ext4_free_blocks_count_set(es, buf->f_bfree); 3350bd81d8eeSLaurent Vivier buf->f_bavail = buf->f_bfree - ext4_r_blocks_count(es); 3351bd81d8eeSLaurent Vivier if (buf->f_bfree < ext4_r_blocks_count(es)) 3352ac27a0ecSDave Kleikamp buf->f_bavail = 0; 3353ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 335452d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 33555e70030dSBadari Pulavarty es->s_free_inodes_count = cpu_to_le32(buf->f_ffree); 3356617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 3357960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 3358960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 3359960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 3360960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 3361ac27a0ecSDave Kleikamp return 0; 3362ac27a0ecSDave Kleikamp } 3363ac27a0ecSDave Kleikamp 3364ac27a0ecSDave Kleikamp /* Helper function for writing quotas on sync - we need to start transaction before quota file 3365ac27a0ecSDave Kleikamp * is locked for write. Otherwise the are possible deadlocks: 3366ac27a0ecSDave Kleikamp * Process 1 Process 2 3367617ba13bSMingming Cao * ext4_create() quota_sync() 3368dab291afSMingming Cao * jbd2_journal_start() write_dquot() 3369ac27a0ecSDave Kleikamp * DQUOT_INIT() down(dqio_mutex) 3370dab291afSMingming Cao * down(dqio_mutex) jbd2_journal_start() 3371ac27a0ecSDave Kleikamp * 3372ac27a0ecSDave Kleikamp */ 3373ac27a0ecSDave Kleikamp 3374ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3375ac27a0ecSDave Kleikamp 3376ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 3377ac27a0ecSDave Kleikamp { 3378ac27a0ecSDave Kleikamp return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type]; 3379ac27a0ecSDave Kleikamp } 3380ac27a0ecSDave Kleikamp 3381617ba13bSMingming Cao static int ext4_dquot_initialize(struct inode *inode, int type) 3382ac27a0ecSDave Kleikamp { 3383ac27a0ecSDave Kleikamp handle_t *handle; 3384ac27a0ecSDave Kleikamp int ret, err; 3385ac27a0ecSDave Kleikamp 3386ac27a0ecSDave Kleikamp /* We may create quota structure so we need to reserve enough blocks */ 3387617ba13bSMingming Cao handle = ext4_journal_start(inode, 2*EXT4_QUOTA_INIT_BLOCKS(inode->i_sb)); 3388ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 3389ac27a0ecSDave Kleikamp return PTR_ERR(handle); 3390ac27a0ecSDave Kleikamp ret = dquot_initialize(inode, type); 3391617ba13bSMingming Cao err = ext4_journal_stop(handle); 3392ac27a0ecSDave Kleikamp if (!ret) 3393ac27a0ecSDave Kleikamp ret = err; 3394ac27a0ecSDave Kleikamp return ret; 3395ac27a0ecSDave Kleikamp } 3396ac27a0ecSDave Kleikamp 3397617ba13bSMingming Cao static int ext4_dquot_drop(struct inode *inode) 3398ac27a0ecSDave Kleikamp { 3399ac27a0ecSDave Kleikamp handle_t *handle; 3400ac27a0ecSDave Kleikamp int ret, err; 3401ac27a0ecSDave Kleikamp 3402ac27a0ecSDave Kleikamp /* We may delete quota structure so we need to reserve enough blocks */ 3403617ba13bSMingming Cao handle = ext4_journal_start(inode, 2*EXT4_QUOTA_DEL_BLOCKS(inode->i_sb)); 34042887df13SJan Kara if (IS_ERR(handle)) { 34052887df13SJan Kara /* 34062887df13SJan Kara * We call dquot_drop() anyway to at least release references 34072887df13SJan Kara * to quota structures so that umount does not hang. 34082887df13SJan Kara */ 34092887df13SJan Kara dquot_drop(inode); 3410ac27a0ecSDave Kleikamp return PTR_ERR(handle); 34112887df13SJan Kara } 3412ac27a0ecSDave Kleikamp ret = dquot_drop(inode); 3413617ba13bSMingming Cao err = ext4_journal_stop(handle); 3414ac27a0ecSDave Kleikamp if (!ret) 3415ac27a0ecSDave Kleikamp ret = err; 3416ac27a0ecSDave Kleikamp return ret; 3417ac27a0ecSDave Kleikamp } 3418ac27a0ecSDave Kleikamp 3419617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 3420ac27a0ecSDave Kleikamp { 3421ac27a0ecSDave Kleikamp int ret, err; 3422ac27a0ecSDave Kleikamp handle_t *handle; 3423ac27a0ecSDave Kleikamp struct inode *inode; 3424ac27a0ecSDave Kleikamp 3425ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 3426617ba13bSMingming Cao handle = ext4_journal_start(inode, 3427617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 3428ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 3429ac27a0ecSDave Kleikamp return PTR_ERR(handle); 3430ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 3431617ba13bSMingming Cao err = ext4_journal_stop(handle); 3432ac27a0ecSDave Kleikamp if (!ret) 3433ac27a0ecSDave Kleikamp ret = err; 3434ac27a0ecSDave Kleikamp return ret; 3435ac27a0ecSDave Kleikamp } 3436ac27a0ecSDave Kleikamp 3437617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 3438ac27a0ecSDave Kleikamp { 3439ac27a0ecSDave Kleikamp int ret, err; 3440ac27a0ecSDave Kleikamp handle_t *handle; 3441ac27a0ecSDave Kleikamp 3442617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 3443617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 3444ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 3445ac27a0ecSDave Kleikamp return PTR_ERR(handle); 3446ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 3447617ba13bSMingming Cao err = ext4_journal_stop(handle); 3448ac27a0ecSDave Kleikamp if (!ret) 3449ac27a0ecSDave Kleikamp ret = err; 3450ac27a0ecSDave Kleikamp return ret; 3451ac27a0ecSDave Kleikamp } 3452ac27a0ecSDave Kleikamp 3453617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 3454ac27a0ecSDave Kleikamp { 3455ac27a0ecSDave Kleikamp int ret, err; 3456ac27a0ecSDave Kleikamp handle_t *handle; 3457ac27a0ecSDave Kleikamp 3458617ba13bSMingming Cao handle = ext4_journal_start(dquot_to_inode(dquot), 3459617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 34609c3013e9SJan Kara if (IS_ERR(handle)) { 34619c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 34629c3013e9SJan Kara dquot_release(dquot); 3463ac27a0ecSDave Kleikamp return PTR_ERR(handle); 34649c3013e9SJan Kara } 3465ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 3466617ba13bSMingming Cao err = ext4_journal_stop(handle); 3467ac27a0ecSDave Kleikamp if (!ret) 3468ac27a0ecSDave Kleikamp ret = err; 3469ac27a0ecSDave Kleikamp return ret; 3470ac27a0ecSDave Kleikamp } 3471ac27a0ecSDave Kleikamp 3472617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 3473ac27a0ecSDave Kleikamp { 34742c8be6b2SJan Kara /* Are we journaling quotas? */ 3475617ba13bSMingming Cao if (EXT4_SB(dquot->dq_sb)->s_qf_names[USRQUOTA] || 3476617ba13bSMingming Cao EXT4_SB(dquot->dq_sb)->s_qf_names[GRPQUOTA]) { 3477ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 3478617ba13bSMingming Cao return ext4_write_dquot(dquot); 3479ac27a0ecSDave Kleikamp } else { 3480ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 3481ac27a0ecSDave Kleikamp } 3482ac27a0ecSDave Kleikamp } 3483ac27a0ecSDave Kleikamp 3484617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 3485ac27a0ecSDave Kleikamp { 3486ac27a0ecSDave Kleikamp int ret, err; 3487ac27a0ecSDave Kleikamp handle_t *handle; 3488ac27a0ecSDave Kleikamp 3489ac27a0ecSDave Kleikamp /* Data block + inode block */ 3490617ba13bSMingming Cao handle = ext4_journal_start(sb->s_root->d_inode, 2); 3491ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 3492ac27a0ecSDave Kleikamp return PTR_ERR(handle); 3493ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 3494617ba13bSMingming Cao err = ext4_journal_stop(handle); 3495ac27a0ecSDave Kleikamp if (!ret) 3496ac27a0ecSDave Kleikamp ret = err; 3497ac27a0ecSDave Kleikamp return ret; 3498ac27a0ecSDave Kleikamp } 3499ac27a0ecSDave Kleikamp 3500ac27a0ecSDave Kleikamp /* 3501ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 3502ac27a0ecSDave Kleikamp * the quota file and such... 3503ac27a0ecSDave Kleikamp */ 3504617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 3505ac27a0ecSDave Kleikamp { 3506617ba13bSMingming Cao return vfs_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], 3507617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 3508ac27a0ecSDave Kleikamp } 3509ac27a0ecSDave Kleikamp 3510ac27a0ecSDave Kleikamp /* 3511ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 3512ac27a0ecSDave Kleikamp */ 3513617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 35148264613dSAl Viro char *name, int remount) 3515ac27a0ecSDave Kleikamp { 3516ac27a0ecSDave Kleikamp int err; 35178264613dSAl Viro struct path path; 3518ac27a0ecSDave Kleikamp 3519ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 3520ac27a0ecSDave Kleikamp return -EINVAL; 35218264613dSAl Viro /* When remounting, no checks are needed and in fact, name is NULL */ 35220623543bSJan Kara if (remount) 35238264613dSAl Viro return vfs_quota_on(sb, type, format_id, name, remount); 35240623543bSJan Kara 35258264613dSAl Viro err = kern_path(name, LOOKUP_FOLLOW, &path); 3526ac27a0ecSDave Kleikamp if (err) 3527ac27a0ecSDave Kleikamp return err; 35280623543bSJan Kara 3529ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 35308264613dSAl Viro if (path.mnt->mnt_sb != sb) { 35318264613dSAl Viro path_put(&path); 3532ac27a0ecSDave Kleikamp return -EXDEV; 3533ac27a0ecSDave Kleikamp } 35340623543bSJan Kara /* Journaling quota? */ 35350623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 35362b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 35378264613dSAl Viro if (path.dentry->d_parent != sb->s_root) 3538ac27a0ecSDave Kleikamp printk(KERN_WARNING 3539617ba13bSMingming Cao "EXT4-fs: Quota file not on filesystem root. " 35400623543bSJan Kara "Journaled quota will not work.\n"); 35410623543bSJan Kara } 35420623543bSJan Kara 35430623543bSJan Kara /* 35440623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 35450623543bSJan Kara * all updates to the file when we bypass pagecache... 35460623543bSJan Kara */ 35470390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 35480390131bSFrank Mayhar ext4_should_journal_data(path.dentry->d_inode)) { 35490623543bSJan Kara /* 35500623543bSJan Kara * We don't need to lock updates but journal_flush() could 35510623543bSJan Kara * otherwise be livelocked... 35520623543bSJan Kara */ 35530623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 35547ffe1ea8SHidehiro Kawai err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 35550623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 35567ffe1ea8SHidehiro Kawai if (err) { 35578264613dSAl Viro path_put(&path); 35587ffe1ea8SHidehiro Kawai return err; 35597ffe1ea8SHidehiro Kawai } 35600623543bSJan Kara } 35610623543bSJan Kara 35628264613dSAl Viro err = vfs_quota_on_path(sb, type, format_id, &path); 35638264613dSAl Viro path_put(&path); 356477e69dacSAl Viro return err; 3565ac27a0ecSDave Kleikamp } 3566ac27a0ecSDave Kleikamp 3567ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 3568ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 3569ac27a0ecSDave Kleikamp * itself serializes the operations (and noone else should touch the files) 3570ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 3571617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 3572ac27a0ecSDave Kleikamp size_t len, loff_t off) 3573ac27a0ecSDave Kleikamp { 3574ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 3575725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 3576ac27a0ecSDave Kleikamp int err = 0; 3577ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 3578ac27a0ecSDave Kleikamp int tocopy; 3579ac27a0ecSDave Kleikamp size_t toread; 3580ac27a0ecSDave Kleikamp struct buffer_head *bh; 3581ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 3582ac27a0ecSDave Kleikamp 3583ac27a0ecSDave Kleikamp if (off > i_size) 3584ac27a0ecSDave Kleikamp return 0; 3585ac27a0ecSDave Kleikamp if (off+len > i_size) 3586ac27a0ecSDave Kleikamp len = i_size-off; 3587ac27a0ecSDave Kleikamp toread = len; 3588ac27a0ecSDave Kleikamp while (toread > 0) { 3589ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 3590ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 3591617ba13bSMingming Cao bh = ext4_bread(NULL, inode, blk, 0, &err); 3592ac27a0ecSDave Kleikamp if (err) 3593ac27a0ecSDave Kleikamp return err; 3594ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 3595ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 3596ac27a0ecSDave Kleikamp else 3597ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 3598ac27a0ecSDave Kleikamp brelse(bh); 3599ac27a0ecSDave Kleikamp offset = 0; 3600ac27a0ecSDave Kleikamp toread -= tocopy; 3601ac27a0ecSDave Kleikamp data += tocopy; 3602ac27a0ecSDave Kleikamp blk++; 3603ac27a0ecSDave Kleikamp } 3604ac27a0ecSDave Kleikamp return len; 3605ac27a0ecSDave Kleikamp } 3606ac27a0ecSDave Kleikamp 3607ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 3608ac27a0ecSDave Kleikamp * enough credits) */ 3609617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 3610ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 3611ac27a0ecSDave Kleikamp { 3612ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 3613725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 3614ac27a0ecSDave Kleikamp int err = 0; 3615ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 3616ac27a0ecSDave Kleikamp int tocopy; 3617617ba13bSMingming Cao int journal_quota = EXT4_SB(sb)->s_qf_names[type] != NULL; 3618ac27a0ecSDave Kleikamp size_t towrite = len; 3619ac27a0ecSDave Kleikamp struct buffer_head *bh; 3620ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 3621ac27a0ecSDave Kleikamp 36220390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 3623e5f8eab8STheodore Ts'o printk(KERN_WARNING "EXT4-fs: Quota write (off=%llu, len=%llu)" 36249c3013e9SJan Kara " cancelled because transaction is not started.\n", 36259c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 36269c3013e9SJan Kara return -EIO; 36279c3013e9SJan Kara } 3628ac27a0ecSDave Kleikamp mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); 3629ac27a0ecSDave Kleikamp while (towrite > 0) { 3630ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < towrite ? 3631ac27a0ecSDave Kleikamp sb->s_blocksize - offset : towrite; 3632617ba13bSMingming Cao bh = ext4_bread(handle, inode, blk, 1, &err); 3633ac27a0ecSDave Kleikamp if (!bh) 3634ac27a0ecSDave Kleikamp goto out; 3635ac27a0ecSDave Kleikamp if (journal_quota) { 3636617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 3637ac27a0ecSDave Kleikamp if (err) { 3638ac27a0ecSDave Kleikamp brelse(bh); 3639ac27a0ecSDave Kleikamp goto out; 3640ac27a0ecSDave Kleikamp } 3641ac27a0ecSDave Kleikamp } 3642ac27a0ecSDave Kleikamp lock_buffer(bh); 3643ac27a0ecSDave Kleikamp memcpy(bh->b_data+offset, data, tocopy); 3644ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 3645ac27a0ecSDave Kleikamp unlock_buffer(bh); 3646ac27a0ecSDave Kleikamp if (journal_quota) 36470390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 3648ac27a0ecSDave Kleikamp else { 3649ac27a0ecSDave Kleikamp /* Always do at least ordered writes for quotas */ 3650678aaf48SJan Kara err = ext4_jbd2_file_inode(handle, inode); 3651ac27a0ecSDave Kleikamp mark_buffer_dirty(bh); 3652ac27a0ecSDave Kleikamp } 3653ac27a0ecSDave Kleikamp brelse(bh); 3654ac27a0ecSDave Kleikamp if (err) 3655ac27a0ecSDave Kleikamp goto out; 3656ac27a0ecSDave Kleikamp offset = 0; 3657ac27a0ecSDave Kleikamp towrite -= tocopy; 3658ac27a0ecSDave Kleikamp data += tocopy; 3659ac27a0ecSDave Kleikamp blk++; 3660ac27a0ecSDave Kleikamp } 3661ac27a0ecSDave Kleikamp out: 36624d04e4fbSJan Kara if (len == towrite) { 36634d04e4fbSJan Kara mutex_unlock(&inode->i_mutex); 3664ac27a0ecSDave Kleikamp return err; 36654d04e4fbSJan Kara } 3666ac27a0ecSDave Kleikamp if (inode->i_size < off+len-towrite) { 3667ac27a0ecSDave Kleikamp i_size_write(inode, off+len-towrite); 3668617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 3669ac27a0ecSDave Kleikamp } 3670ac27a0ecSDave Kleikamp inode->i_mtime = inode->i_ctime = CURRENT_TIME; 3671617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 3672ac27a0ecSDave Kleikamp mutex_unlock(&inode->i_mutex); 3673ac27a0ecSDave Kleikamp return len - towrite; 3674ac27a0ecSDave Kleikamp } 3675ac27a0ecSDave Kleikamp 3676ac27a0ecSDave Kleikamp #endif 3677ac27a0ecSDave Kleikamp 3678617ba13bSMingming Cao static int ext4_get_sb(struct file_system_type *fs_type, 3679ac27a0ecSDave Kleikamp int flags, const char *dev_name, void *data, struct vfsmount *mnt) 3680ac27a0ecSDave Kleikamp { 3681617ba13bSMingming Cao return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super, mnt); 3682ac27a0ecSDave Kleikamp } 3683ac27a0ecSDave Kleikamp 36845e8814f2STheodore Ts'o #ifdef CONFIG_PROC_FS 36855e8814f2STheodore Ts'o static int ext4_ui_proc_show(struct seq_file *m, void *v) 36865e8814f2STheodore Ts'o { 36875e8814f2STheodore Ts'o unsigned int *p = m->private; 36885e8814f2STheodore Ts'o 36895e8814f2STheodore Ts'o seq_printf(m, "%u\n", *p); 36905e8814f2STheodore Ts'o return 0; 36915e8814f2STheodore Ts'o } 36925e8814f2STheodore Ts'o 36935e8814f2STheodore Ts'o static int ext4_ui_proc_open(struct inode *inode, struct file *file) 36945e8814f2STheodore Ts'o { 36955e8814f2STheodore Ts'o return single_open(file, ext4_ui_proc_show, PDE(inode)->data); 36965e8814f2STheodore Ts'o } 36975e8814f2STheodore Ts'o 36985e8814f2STheodore Ts'o static ssize_t ext4_ui_proc_write(struct file *file, const char __user *buf, 36995e8814f2STheodore Ts'o size_t cnt, loff_t *ppos) 37005e8814f2STheodore Ts'o { 370123475e26SRoel Kluin unsigned long *p = PDE(file->f_path.dentry->d_inode)->data; 37025e8814f2STheodore Ts'o char str[32]; 37035e8814f2STheodore Ts'o 37045e8814f2STheodore Ts'o if (cnt >= sizeof(str)) 37055e8814f2STheodore Ts'o return -EINVAL; 37065e8814f2STheodore Ts'o if (copy_from_user(str, buf, cnt)) 37075e8814f2STheodore Ts'o return -EFAULT; 370823475e26SRoel Kluin 370923475e26SRoel Kluin *p = simple_strtoul(str, NULL, 0); 37105e8814f2STheodore Ts'o return cnt; 37115e8814f2STheodore Ts'o } 37125e8814f2STheodore Ts'o 37135e8814f2STheodore Ts'o const struct file_operations ext4_ui_proc_fops = { 37145e8814f2STheodore Ts'o .owner = THIS_MODULE, 37155e8814f2STheodore Ts'o .open = ext4_ui_proc_open, 37165e8814f2STheodore Ts'o .read = seq_read, 37175e8814f2STheodore Ts'o .llseek = seq_lseek, 37185e8814f2STheodore Ts'o .release = single_release, 37195e8814f2STheodore Ts'o .write = ext4_ui_proc_write, 37205e8814f2STheodore Ts'o }; 37215e8814f2STheodore Ts'o #endif 37225e8814f2STheodore Ts'o 372303010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 3724ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 372503010a33STheodore Ts'o .name = "ext4", 3726617ba13bSMingming Cao .get_sb = ext4_get_sb, 3727ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 3728ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 3729ac27a0ecSDave Kleikamp }; 3730ac27a0ecSDave Kleikamp 373103010a33STheodore Ts'o #ifdef CONFIG_EXT4DEV_COMPAT 373203010a33STheodore Ts'o static int ext4dev_get_sb(struct file_system_type *fs_type, 373303010a33STheodore Ts'o int flags, const char *dev_name, void *data, struct vfsmount *mnt) 373403010a33STheodore Ts'o { 373503010a33STheodore Ts'o printk(KERN_WARNING "EXT4-fs: Update your userspace programs " 373603010a33STheodore Ts'o "to mount using ext4\n"); 373703010a33STheodore Ts'o printk(KERN_WARNING "EXT4-fs: ext4dev backwards compatibility " 373803010a33STheodore Ts'o "will go away by 2.6.31\n"); 373903010a33STheodore Ts'o return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super, mnt); 374003010a33STheodore Ts'o } 374103010a33STheodore Ts'o 374203010a33STheodore Ts'o static struct file_system_type ext4dev_fs_type = { 374303010a33STheodore Ts'o .owner = THIS_MODULE, 374403010a33STheodore Ts'o .name = "ext4dev", 374503010a33STheodore Ts'o .get_sb = ext4dev_get_sb, 374603010a33STheodore Ts'o .kill_sb = kill_block_super, 374703010a33STheodore Ts'o .fs_flags = FS_REQUIRES_DEV, 374803010a33STheodore Ts'o }; 374903010a33STheodore Ts'o MODULE_ALIAS("ext4dev"); 375003010a33STheodore Ts'o #endif 375103010a33STheodore Ts'o 3752617ba13bSMingming Cao static int __init init_ext4_fs(void) 3753ac27a0ecSDave Kleikamp { 3754c9de560dSAlex Tomas int err; 3755c9de560dSAlex Tomas 37569f6200bbSTheodore Ts'o ext4_proc_root = proc_mkdir("fs/ext4", NULL); 3757c9de560dSAlex Tomas err = init_ext4_mballoc(); 3758ac27a0ecSDave Kleikamp if (err) 3759ac27a0ecSDave Kleikamp return err; 3760c9de560dSAlex Tomas 3761c9de560dSAlex Tomas err = init_ext4_xattr(); 3762c9de560dSAlex Tomas if (err) 3763c9de560dSAlex Tomas goto out2; 3764ac27a0ecSDave Kleikamp err = init_inodecache(); 3765ac27a0ecSDave Kleikamp if (err) 3766ac27a0ecSDave Kleikamp goto out1; 376703010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 3768ac27a0ecSDave Kleikamp if (err) 3769ac27a0ecSDave Kleikamp goto out; 377003010a33STheodore Ts'o #ifdef CONFIG_EXT4DEV_COMPAT 377103010a33STheodore Ts'o err = register_filesystem(&ext4dev_fs_type); 377203010a33STheodore Ts'o if (err) { 377303010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 377403010a33STheodore Ts'o goto out; 377503010a33STheodore Ts'o } 377603010a33STheodore Ts'o #endif 3777ac27a0ecSDave Kleikamp return 0; 3778ac27a0ecSDave Kleikamp out: 3779ac27a0ecSDave Kleikamp destroy_inodecache(); 3780ac27a0ecSDave Kleikamp out1: 3781617ba13bSMingming Cao exit_ext4_xattr(); 3782c9de560dSAlex Tomas out2: 3783c9de560dSAlex Tomas exit_ext4_mballoc(); 3784ac27a0ecSDave Kleikamp return err; 3785ac27a0ecSDave Kleikamp } 3786ac27a0ecSDave Kleikamp 3787617ba13bSMingming Cao static void __exit exit_ext4_fs(void) 3788ac27a0ecSDave Kleikamp { 378903010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 379003010a33STheodore Ts'o #ifdef CONFIG_EXT4DEV_COMPAT 3791617ba13bSMingming Cao unregister_filesystem(&ext4dev_fs_type); 379203010a33STheodore Ts'o #endif 3793ac27a0ecSDave Kleikamp destroy_inodecache(); 3794617ba13bSMingming Cao exit_ext4_xattr(); 3795c9de560dSAlex Tomas exit_ext4_mballoc(); 37969f6200bbSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 3797ac27a0ecSDave Kleikamp } 3798ac27a0ecSDave Kleikamp 3799ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 380083982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 3801ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 3802617ba13bSMingming Cao module_init(init_ext4_fs) 3803617ba13bSMingming Cao module_exit(exit_ext4_fs) 3804